Question

Findthesquareofthefollowingnumbers:

68​

Answer 1

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${68}^{2} = (60 + 8) {}^{2} \\ \sf Using \: identity \: (a + b) {}^{2} \\ 60 {}^{2} + 2 \times 60 \times 8 + 8 {}^{2} \\ 3600 + 960 + 64 \\ {68}^{2} = 4624$