Question

If (a+b)²= a²+2xaxb+b²

Then find (67+12)²=.......?

Answer 1

Answer:

According to the question,

${(a + b)}^{2} = {a}^{2} + 2ab + {b}^{2} \\ {(67 + 12)}^{2} = {67}^{2} + 2 \times 67 \times 12 + {12}^{2} \\ = 4489 + 134 \times 12 + 144 \\ = 4623 \times 12 + 144 \\ = 4623 \times 156 \\ = 721188$

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