Example 1: Factoring a difference of squares with two variables | Algebra II | Khan Academy

Factor x^2-49y^2 as (x+7y)(x-7y).

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[unholyscraming]

thank you so much! i have a midterm tomorrow and this really saved me!

[mazmusicornament]

just foil and check
if (x-7)(x+7) equals the expression above,
doesnt matter what order you put
it can look like this also, (x+7)(x-7)

just foil, aka FIRST, OUTSIDE, INSIDE, LAST.
thus,
x^ - 7x+7x, or the 2nd order could be 7x-7x, depend how you switch it up like above
then last term is -49
so its x^-49. done. And that ^ means squared, i dont like writing ^2, that looks silly. Dont forget to put y next to 49 though.

[Squatimus]

Thank you, you saved me from failing my culminating.

[spicymemes]

Wow zoom calls lead you to some uninteresting places on the internet

[VM-yexw]

all he's doing is simple. all thats being done is he square roots both numbers and puting them together, like the A and B in his example. Simple

[bobbyjay]

watch it again, and again, and again.

[ingridseiss]

1:32 why is it x+7y instead of x²7y like the given?

[denki.]

Tutorial is easy but the homeworks are hard :/

[kimary]

What is the difference between a variable and a factor?