Add 3x²+7x +7,9x²-2x+5
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(3+9)x^2 +(7-2)x + 7+5 = 12x^2 +5x +12
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4
Answer:
Step-by-step explanation:
3x*x+7x+7
+ 9x*x-2x+5
=12x*x+5x+12
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