Question

Find the product of (2x + 5y)^2.

4x^2 + 20xy + 25y^2

4x^2 − 20xy + 25y^2

4x^2 − 25y^2

4x^2 + 25y^2
@jim_thompson5910

Answer 1

(2x + 5y)^2

(2x + 5y)(2x + 5y)

2x(2x + 5y) + 5y(2x + 5y)

I'll let you finish up

Answer 2

darn it -_-

Answer 3

you're on the right track Luigi0210, it should be a^2 + 2ab + b^2 though

Answer 4

Yea, just noticed that.. thanks for the correction

Answer 5

np

Answer 6

I got this @jim_thompson5910 http://www.sketchtoy.com/35392005

Answer 7

2x(2x + 5y)

turns into

2x*2x + 2x*5y

and that turns into

4x^2 +10xy

Answer 8

the second bit 5y(2x + 5y) is simplified the same way

Answer 9

http://www.sketchtoy.com/35393074 ?

Answer 10

5y*5y is NOT 25y

but it's actually ______

Answer 11

I don't know what it would be > . < 5 * 5 is 25

Answer 12

that part is correct, but y times y is not y

Answer 13

y times y = ______

Answer 14

Oh, 25y^2?

Answer 15

yep, now combine like terms

Answer 16

http://www.sketchtoy.com/35393970

Answer 17

@jim_thompson5910 am I correct?

Answer 18

close, but 10xy plus 10xy is 20xy and the 20 is positive

Answer 19

So, the first one?

Answer 20

correct