Question

31²-29²=
How to solve steps please

Answer 1

Answer:

31×31=961

29×29=841

961-841=120

Answer 2

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${a}^{2} - {b}^{2} = (a + b)(a - b) \\ {31}^{2} - {29}^{2} = (31 + 29)(31 - 29) \\ \\ = 60 \times 2 \\ = 120$