Answer:
Their is not supposed to be a negative sign infront of the 9x
Explanation:
9x^2 -2x+8
( 9x^2 -5x) - ( -3x -8)
Distribute the minus sign
( 9x^2 -5x) +3x +8
Combine like terms
The x^2 should be positive and you have it as negative
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