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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[@Kamabushi999]

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.

[@bobcornwell403]

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

[@user-om6if1nv3d]

Great example. Tks.

[@danieldennis9831]

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

[@genelowry5666]

X^2-4Y^2 = (X+2Y)(X-2Y)

[@mconwell]

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

[@danielmadden9691]

(x+2y)(x-2y)

[@Antonio_Gallego]

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

[@Turi6070]

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

[@marymurphy937]

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

[@christopherhennessey8991]

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

[@alastairgreen2077]

Too difficult a problem, not of a problem.