( 5x 2nd power + 2 ) - ( -4x 2nd power + 7 ) + ( - 3x 2nd power - 5 ) =
A 5x to the power of 2 - 9
B 9x to the power of 2 - 10
C 6x to the power of 2 - 10
D 5x to the power of 2 - 10

C

Step-by-step explanation:

5x 2nd power -(-4x 2nd power) makes it a positive which is 9x 2nd power then 9x 2nd power +(-3x 2nd power) which + and - make it 9x 2nd power-3x 2nd power which equals 6x 2nd power. The only answer choice with 6x 2nd power is C.

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right