subtract: $(7x^{2}-12x + 3)-(-10x^{2}-3x + 12)$\n$-3x^{2}-15x + 15$\n$17x^{2}-15x - 9$\n$-3x^{2}-15x…
subtract: $(7x^{2}-12x + 3)-(-10x^{2}-3x + 12)$\n$-3x^{2}-15x + 15$\n$17x^{2}-15x - 9$\n$-3x^{2}-15x - 9$\n$17x^{2}-9x - 9$
Answer
Explanation:
Step1: Remove the parentheses
$$(7x^{2}-12x + 3)-(-10x^{2}-3x + 12)=7x^{2}-12x + 3 + 10x^{2}+3x-12$$
Step2: Combine like - terms
For the (x^{2}) terms: (7x^{2}+10x^{2}=(7 + 10)x^{2}=17x^{2}) For the (x) terms: (-12x+3x=(-12 + 3)x=-9x) For the constant terms: (3-12=-9)
Answer:
(17x^{2}-9x - 9) (the fourth option)