Question

1. which of the following expressions is completely simplified?
A.-3x^3 - 6x^2 +18x
9(x^2+2x) - 3x(x^2+5x)
-3x^3 - 15x^2 +9x^2 +18x
9x^2+ 18x- x (3x^2+15x)
2. Simplify 3x + 7(3x + 2) + 4x – 5.
A.
28x – 3
B.
28x + 9
C.
34x + 15
D.
70x – 2
3.Which is an example of using the distributive property to multiply
-5x^3(3x^2+3x-1)
A.-5x^3 x 3X^2 - 5x^3 3x - 5x^3 x 1
B.-5x^3 x 3X^2 - 5x^3 x 3x + 5x^3 x 1
C.-5x^3 x 3X^2 + 5x^3 x 3x - 5x^3 x 1
D.-5x^3 x 3X^2 + 5x^3 x 3x + 5x^3 x 1 please i need help thanx and coulda anyone describe a method to solve these? aswell?

Answer 1

Number 2. Distribute the 7 into (3x+2) and then condense it all.