3(x-1) -2(x^2+3x+4)-5(x+9)=

Answer 1

Start by expanding the parentheses:

3(x-1) -2(x^2+3x+4)-5(x+9)
3x - 3 - 2x^2 - 6x - 8 - 5x - 45

Then collect terms of like degree:

-2x^2 + (3-6-5)x + (-3-8-45)
-2x^2 - 8x - 56