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a.) Simplify the following expression: (9x2+2x−5)+(6x2−5x+4)(9x2+2x-5)+(6x2-5x+4) b.) Explain how you know your answer is correct.
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a.) Simplify the following expression: (9x2+2x−5)+(6x2−5x+4)(9x2+2x-5)+(6x2-5x+4) b.) Explain how you know your answer is correct.

User Reina
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54x4-12x3-30x2-45x3-10x2+25x+9x2+2x-5+6x2-5x+4= 54x4-57x3-25x2+22x-1. This is the correct answer because I distributed the first parentheses to the second. then from there you combine like terms.
User Niels Hameleers
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