(2x+9)power2 .That is the sum. how to solve?
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Answer:
(2x+9)².
By using formula (a+b)²=a²+2ab+b² where a=2x & b=9.
(2x+9)²=(2x)²+2(2x)(9)+(9)².
=4x²+36x+81.
I think this is your answer.
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