Question

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

4x^2 − 20xy + 25y^2

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

4x^2 + 25y^2

4x^2 − 25y^2

Answer 1

this is the difference of 2 squares so the middle term will disappear.. and your will have only 2 terms

Answer 2

so c or d?

Answer 3

Yup C or D. Look at the two signs of 5 and -5 when multiplied and you will have your answer.

Answer 4

in general :
\[(a-b)(a+b)=a^2-b^2\]

Answer 5

so its D

Answer 6

Yup becaause -b*b is -b^2 :P

Answer 7

thank you :)

Answer 8

Welcome! :')