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anonymous
 one year ago
Find the sum of the given polynomials.
3x ^2 + 2x  5 and 4 + 7x ^2
anonymous
 one year ago
Find the sum of the given polynomials. 3x ^2 + 2x  5 and 4 + 7x ^2

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marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1First, you have to add like terms, so you will add 3x^2+7x^2 and 54

marihelenh
 one year ago
Best ResponseYou've already chosen the best response.1You should get 10x^2 and 9. To finish, add back in the 2x. Your final answer will be 10x^2+2x9.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Like terms are terms that have the same variable part. That means the same variables and the same exponents. You can only add together like terms. \((\color{red}{3x ^2 + 2x  5}) + (\color{green}{4 + 7x ^2}) =\) \(=\color{red}{3x^2} + \color{green}{7x^2} + \color{red}{2x} + \color{red}{(5) } + \color{green}{(4)}\) \(=\color{red}{3x^2 + 7x^2} + 2x + \color{green}{(5) + (4)}\) \(= 10x^2 + 2x  9\)
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