(2a+3b)²=4a²+_____+9b²
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Answered by
1
Answer:
=(2a+3b)^2
=(2a)^2 +2*2a*3b +(3b)^2
=4a^2 +12ab + 9b^2
Answered by
0
6ab²
(a+b)²=a²+2ab+b²
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