Question

how to find the square of a 3 digit number​

Answer 1

Calculating the square of 3 digit number quickly

STEP 2. Second Last Digit = 2*Y*Z + carryover from STEP 1. STEP 3. Third Last Digit 2*X*Z+ Sq (Y) + carryover from STEP 2.

Answer 2

Step-by-step explanation:

Just use

${(a +b + c) }^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2abc(a + b + c)$

Ex Square of 111

${111}^{2} \\ {(100 + 10 + 1)}^{2} \\ {100}^{2} + {10}^{2} + {1}^{2} + 2 \times 100 \times 10 \times 111 \\ 10000 + 100 + 1 + 2200 \\ 12301$

Hope it helps you mate.

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