Question

How do you solve (x - 2y)(x + 2y) = 4

Answer 1

good question

Answer 2

No solutions

Answer 3

multiply out, then subtract 4, then factor or use quadratic formula

Answer 4

2 unknowns one equation.. not enough info i should say..

Answer 5

oh woops!

Answer 6

couldn't hurt to read the problem. what is there to solve? one equation, two unknowns.

Answer 7

Base off of this information (x - 2y)(x + 2y) = 4
which quanity is greater A) x^2-4y^2 or B)8

Answer 8

8

Answer 9

\[(x^2-4y^2=4\]
\[y^2=\frac{4-x^2}{4}\]
\[y=\pm\frac{\sqrt{4-x^2}}{2}\]

Answer 10

ok now i am getting cranky so maybe i should log off. really though before wasting peoples time it would really be nice if the entire question would be posted.

Answer 11

Good point satellite

Answer 12

that is good way to solve it, thanks and the answer is 8