SOLUTION: I asked this question before but I'm confused: Solve the expression: (4sqrt(x) + 4sqrt(y)) * (4sqrt(x) - 4sqrt(y))

Algebra ->  Expressions-with-variables -> SOLUTION: I asked this question before but I'm confused: Solve the expression: (4sqrt(x) + 4sqrt(y)) * (4sqrt(x) - 4sqrt(y))       Log On


   

Question 395373: I asked this question before but I'm confused:
Solve the expression: (4sqrt(x) + 4sqrt(y)) * (4sqrt(x) - 4sqrt(y))
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
remember: Difference of Squares a%5E2-+b%5E2++=%28a%2B+b%29%28a+-+b%29 or %28a+-+b%29%28a+%2B+b%29
you apply it here

%284sqrt%28x%29+%2B+4sqrt%28y%29%29+%2A+%284sqrt%28x%29+-+4sqrt%28y%29%29+

+%28%284sqrt%28x%29+%29%5E2-+%284sqrt%28y%29%29%5E2%29+

+4%5E2%28sqrt%28x%29+%29%5E2-+4%5E2%28sqrt%28y%29%29%5E2%29+

+16x-+16y+

+16%28x-+y+%29