What is simplified form of -3z^2(z+2)-4(z^2+1)? a.-7x^2+1 b.-3z^3-4z^2-6z-4 c.-3z^3-2z^2-4 4.-3z^3-10z^2-4

answer: 45

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3