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anastassius [24]
3 years ago
13

Simplify (5x2 + 3x + 4) + (5x2 + 5x - 1).

Mathematics
1 answer:
marishachu [46]3 years ago
5 0
23+8X is the answer to this problem
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The answer is:  [A]:   45x² + 81x + 36 .
_________________________

Explanation:  Use "FOIL" technique: (First, Outer, Inner, and Last Terms); 
                       then, combine the "like terms", to simplify. 
__________________________________________

(5x+4)(9x+9) = 45x² + 45x + 36x + 35 = 45x² + 81x + 36 .
                                                                       (which is answer choice: "A".).
________________________________________________
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