Answer:
B
Step-by-step explanation:
The distributive property tells us:
[tex]a(b+c+d)=ab+ac+ad[/tex]
So we multiply each term inside the parenthesis with whatever is outside the parenthesis.
The problem given is [tex]-5x^3(3x^2+3x-1)[/tex]
So we multiply [tex]-5x^3[/tex] with each of the terms inside the parenthesis (remembering to take the signs as well). Thus we have:
[tex]-5x^3(3x^2+3x-1)\\=-5x^3*3x^2-5x^3*3x-5x^3*-1\\=-5x^3*3x^2-5x^3*3x+5x^3*1[/tex]
Hence answer choice B is right.
