Question

Question 2

Select all expressions that are equivalent to x² + 4x.


x(x + 4)
(x + 2)²
(x+x) (x+4)
(x + 2)² - 4
(x+4) x

Answer 1

Correct answers: x(x+4) , (x+2)^2 -4 , (x+4)x

1) x(x+4) -> distribute
= x^2 + 4x

2) (x+2)^2
= (x+2)(x+2)
= x^2 * 4x + 4

3) (x+x)(x+4)
= (2x) (x+4)
= 2x^2 + 8x

4) (x+2)^2 -4
= (x+2)(x+2) - 4
= x^2 * 4x + 4 - 4
= x^2 + 4x


5) (x+4)x -> distribute
= x^2 + 4x