Question

Solve: (a+b)²=a²+2ab+b²(using this identity) for 31²

Answer 1

Step-by-step explanation:

961 is the answer of 31 squate, please do watch the process of aplus b whole square method

Answer 2

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• Find the value of (31)² using formula.

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$\\ \\ (31) {}^{2} = (30 + 1) {}^{2} \\ \\ 30 = a \\ \\ 1 = b$

$(30) {}^{2} + 2(30 \times 1) + (1) {}^{2} \\ \\ 900 + 60 + 1$

AFTER ADDING THE VALUES,

THE FINAL ANSWER IS :-

$= 961$

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