Question

subtract the sum of (8a-6a2+9) and (-10a-8+8a2) from -3

Answer 1

(8a-6a²+9-10a-8+8a²)-(-3)
-2a+2a²-1+3
-2a+2a²+2
2(-a+a²+1)

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Answer 2

first of all we will add (8a6a2+9) and (-10a-8+8a2) and when we got the answer after adding them then subtract it from -3 we will get the answer.

(8a-6a2+9)+(-10a-8+8a2)
8a-6a2+9-10a-8+8a2
8a-10a-6a2+8a2+9-8
-2a+2a2+1
(-3)-(-2a+2a2+1)
-3+2a-2a2-1
-3-1+2a-2a2
-4+2a-2a2