Better know this factoring formula to PASS Algebra! (x squared) – 4 (y squared) = ?

How to factor a polynomial using the difference of two squares special factoring rule.

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[Kamabushi]

I wish there had been internet back in the late 60s
So much math suffering!
This guy is so awesome.
Even his suggestion to go thru factoring boot camp is an excellent advice.

[Kleermaker]

This is conform a^2 - b^2 = (a + b)(a - b). So the answer is: (X + 2 Y)(X - 2 Y). This is no solution but the result of factoring.

[bobcornwell]

This is a perfect beginner factoring problem. An excellent introduction to factoring.

[mconwell]

It has been years since algebra, but why wouldn’t the answer be: y=sqrt(x^2/4) ?

[danieldennis]

I know this factors to (x+2y)(x-2y) y=1/2x or -1/2x. Or x=2y or -2y

[Antonio_Gallego]

factoring is one of the best secondary math takeaways you can get

[Turi]

if you see anything with n^2 - m^2 (n - m)(n + m)

[christopherhennessey]

Yes, I remember good old Algebra 1 back in ninth grade. Was fortunate enough to take Pre-Algebra in eighth grade.

[marymurphy]

( x--2Y)( X+2Y) I.e the difference of squares.

[alastairgreen]

Too difficult a problem, not of a problem.