Answer:
c. 7x2 +18 - 4x2 – 3 + 6x
Step-by-step explanation:
3(x^2 + 2x + 5)
3x^2 + 6x + 15
a.) 7x^2 - 18 - 4x^2 – 3 + 6x
= 3x^2 - 21 + 6x
b.) 7x^2 +18 - 4x^2 – 3 + 8x
= 3x^2 + 15 + 8x
c.) 7x2 +18 - 4x2 – 3 + 6x
= 3x^2 + 15 + 6x
d.) 7x2 +18 - 3x2 – 3 + 6x
= 4x^2 + 15 + 6x
