How do you simplify 8(5+x) -3x(x-3)?

1 Answer
Apr 20, 2016

=-3x^2+17x+40

Explanation:

To simplify it (and therefore solve it), you'll need to know the distributive property, which is a(b+c)=ab+ac If you want further explanation of this, please say so

Applying that to the original equation:
8(5+x)-3x(x-3)=8(5)+8(x)-3x(x)-3x(-3)
=40+8x-3x^2+9x
=-3x^2+17x+40