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12 votes
If C = x + 6 and D = 3x - 6 + 4x2, find an expression that equals C + 3D in

standard form.
Help please

1 Answer

4 votes

Answer:

12x²+10x-12

Explanation:

x+6 + 3(3x-6+4x²)

x+6 +9x-18+12x²

12x²+10x-12

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