evaluate using identity (8.6)square
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(8.6)² = (8+0.6)²
= 8²+2(8)(0.6)+(0.6)².........using identity
(a+b)² =a²+2ab+b²
= 64+9.6+0.36
(8.6)² = 53.96
= 8²+2(8)(0.6)+(0.6)².........using identity
(a+b)² =a²+2ab+b²
= 64+9.6+0.36
(8.6)² = 53.96
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