add 7x²-4x+5,-3x²+2x-2,7x²-2x-9
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Answer:
Answer is 11x² - 4x - 6
Step-by-step explanation:
(7x²-4x+5)+(-3x²+2x-2)+(7x²-2x-9)
7x²-4x+5-3x²+2x-2+7x²-2x-9
7x²-3x²+7x²-4x+2x-2x+5-2-9
11x²-4x-6
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