SOLUTION: (a + b)^2 - (a - b)^2 = ab^2 + ab^2 = 2ab + 2ab = 4ab would you say this equation is solved correctly? I'm concerned that I might have skipped a step.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: (a + b)^2 - (a - b)^2 = ab^2 + ab^2 = 2ab + 2ab = 4ab would you say this equation is solved correctly? I'm concerned that I might have skipped a step.      Log On


   

Question 45516: (a + b)^2 - (a - b)^2
= ab^2 + ab^2
= 2ab + 2ab
= 4ab
would you say this equation is solved correctly?
I'm concerned that I might have skipped a step.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
(a + b)^2 - (a - b)^2
=a^2+2ab+b^2 -[a^2-2ab+b^2]
=4ab
Cheers,
Stan H.