Digital SAT Prep: Easy Desmos Hack for the Hardest Math Problems!

Do you want to know the BEST trick for tackling the hardest digital SAT math questions on BlueBook Module 2? Using the Desmos calculator is the key to getting the toughest SAT math questions correct quickly and easily. I walk you through and explain four different math problems from BlueBook Practice Test 4. So you can be prepared for the October digital SAT or the PSAT in 2023 and beyond! Get your digital SAT goal score with these few simple adjustments in your SAT math strategies. I'd recommend you watch my other digital SAT study guide videos from this past year as well to improve your SAT score :) Learn how to score 100 points higher, 200 points higher, or even perfect on the SAT math and get into your dream college!

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My name is Laura Whitmore and I own Strategic Test Prep. I have been an SAT and ACT test prep tutor for over 15 years! I have helped hundreds of high school students boost their scores on both the SAT and ACT tests. My students have had significant score gains using my strategies! After only 3-6 months working with me, 94% of my students increase their SAT scores by 100-350 points. I have a team of tutors who were all former students of mine and score 1450+! We would be happy to work with you to get you the success we have gotten for others!

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[chadchampion]

Here's an alternative solution to the last problem:
a+b+c is f(1). Since the parabola is open upwards, (9, -14) is the minimum value of f(x). Thus, f(1) (whatever it is) must be greater than 14 i.e. a+b+c > -14
Only choice d fulfills this criteria.

[savvas]

Another very easy solution for question 2 I think would be to know that the Product = c / a so because c = ab and a = 57 , c/a = ab/57 = kab . The ab’s cancel out and we’re left with 1/57 = k

[KonradTittel]

A shortcut for the second problem is to have the what's called "Vieta's Formula's" memorized, which are really simple: the product of the solutions (roots) of a quadratic ax^2 + bx + c is c/a, and the sum of the roots is -b :D

[adityabhambhani]

This right here is a goldmine!! Thanksss! rlly helpful!!

[gregnixon]

Becoming a calculator jockey is an under-rated strategy. A TI-84 Plus CE has functions in the APPS menu that bring high scores well within reach. You don’t need to be a math guru, just understand how to use the allowed tools.

[shehlabtskz]

Thank you so much teacher it was so helpful to me❤. We are waiting for the part 2

[peacein_solitude]

Thank u much ...u hv no idea how this really helped..

[letsgotousa]

Please make a video on "hard reading questions" on module 2

[ucheshub]

You saved my Nigerian Life😩. I could kiss you. Thank you so much Ma'am. ♥️♥️✌️✌️

[qwdoqtn]

for the last question would it also work if I add the minimum plus the x intercept plus the y intercept? It also gives 12 but I don't know if that is a correct way to solve.

[psych-shorts]

The first one isn’t that bad really. If it says that it only has one solution then it means that the lines only hit once. For that to happen y=-1.5 (the straight line) has to be just touching the bottom part of the parabola (height at vertex). We know that the vertex is x= -b/2a, and height y = f(-b/2a). From there its making the line’s height = to the vertex height.

[nahomdesta]

Thank you for what you do to help us, Laura. I've been watching your videos for a while now and I really appreciate what you do.
But, I have a question on the second question. Why exactly did we set a and b as 1?

[fredabila]

Your explanation for using the calculator was easy to comprehend but the solution to the questions were quite difficult to understand

[parrotsarecolorful]

oh my god the lighting how many lights do you have haha
nevertheless, you always drop banger videos.

[leonmaurice]

I solved these problems like this:

92) Use Discriminant D=0; b^2–4ac = 0. Solving for a gives a = 14.5
95) Use x1*x2 = c/a = ab/57; k= 1/57.
98) V(9/-14); f(x) = a(x-9)^2 – 14 = ax^2 – 18ax + 81a – 14; a+b+c = 64a – 14.
Since the parabola touches the x-axis twice and yV = -14, the limit as n->∞ is ∞, and, thus, a>0, from which follows that 64a – 14 > -14. The solution, hence, must be –12.

[euniceolaoye]

Hey, i have never used the desmos and my exam is on saturday. Do you advise that i should just stick with using my calculator or get familiar with the desmos?

[Dawodu_Gbolahan_David]

Please I want to buy your course but is only English I want to buy because I can't afford both with the price given but I really want to buy the English

[_Getmoney]

I have my exams on Oct 7 🥹 And I am currently hitting only 640 in Maths and 630 in English .I need to improve at least 80 points each in the next 27 days 🙂 Totally scared

[mollygarnett]

Why is it a(x-9) for Practice 4, question 98?

[lunalinedigital_]

8:36 I don't get why D is the answer. What if c was less than a and b, wouldn't that make a + b + c answer as positive?