qual o desenvolvimento de (10×+6)²
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(10x+6)²
(10x)²+2(10x)(6)+6²
100x²+120x+36
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(a+b)²=a²+2ab+b²
(10x)²+2×10x×6+6²
100x²+2×10x×6+6²
100x²+120x+6²
100x²+120x+36
(10x+6)×(10x+6)
10x×10x+10x×6+6×10x+6×6
100x²+10x×6+6×10x+6×6
100x²+60x+6×10x+6×6
100x²+60x+60x+6×6
100x²+60x+60x+36
109x²+120x+36
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