Question

8.

Mixed Practice: Simplify the expressions and express as a polynomial in standard form:
4. -3x(9x-4)
5.x(2x^2+x) 6. -5x^2-4x+1) 7. (3x-5y+z)-(2x-4y-z)

Answer 1

4 = -27x^2+12x

5 = 2x^3+x^2

6 = -5x^2+4x-1

7 = x-y+2z

Explanation:

Simple collecting like terms and distributive properties.