SAT and ACT Strategy TIPS AND TRICKS when you forget to Simplify

#shorts #maths

A common strategy used on the ACT and SAT multiple choice

[lilboy]

As an Indian I am triggered by seeing this question taking so much time to be solved

[Sgth]

The one time it's E. Also insightful.

[willostrand]

Be very careful with this, as sometimes substituting an abstract variable with a number will result in an equality that is correct only for that number or only for some numbers.

[geoninja]

Little substitutions can be handy.... I always avoid using 2, as 2x2 = 2+2, and can get you in strife.... I'd probably leave out 1 too.... :)

[Zyoutube]

if i’m gonna try substituting numbers i’ll avoid numbers that have a lot of special cases like 0, 1, 2, i usually use stuff like 5 or 7

[achrafbaiz-bhhq]

You can not seperate them only if are bouth posifivs
Contre example for your explanation
Sqrt(-5×-2)
Its really wel definie because their prodact is positive but you can not splet the
For real world

[itsphoenixingtime]

It is equal to the modulus of a complex number x + yi, where x and y are real numbers

[notend]

Looking like distance formula from origin.

[aasimali]

I think we neeed more questions in which answers came as none of these

[tritran]

Sum of square always resulted in imaginary number during factoring !

[yuvanm]

Try to avoid 1 and 2 cuz 1x1 is 1 and 2x2 and 2+2 is 4
So they are kind of special case

[flavrt]

This technique used to be called Instantiation.

[crimsondragon]

That’s the equation for a circle. It cannot be simplified without first being set equal to something.

[kanishyathra]

It's a basic MCQ question in 9th, 8th STD maths exam in india

[aymaneoulahyane]

Even with the multiplication you can't always spilt them they have to be positif, both of them

[emiyakiritsugu]

can someone explain why it's not a? like the squares can cancel the roots right? so wouldn't it be x+y

[noobynoob]

Idk what the act is but on the nwea for simplification I just pretend each variable is a number and whatever choice is equivalent to what I get on the original problem is the answer

[ksqnnbr]

Bro thats simple, why u making it time consuming
X^2+y^2=(x+y)^2-2xy

So, whole root x^2+y^2 =

Whole root (x+y)^2-2xy =

x+y - √2xy

Correct answer, option (E)

You can solve it mentally

[lakshyadua]

When you neglected (E) at the beginning but eventually found that it also exists and too as the right answer. 🤣

[TheEulerID]

That takes a great deal longer than just noticing none of those first four answers were remotely possible.