Question

how to insert square bracket to making formula​

Answer 1

Answer:

$(x + y) {}^{2} = {x}^{2} + {y}^{2} + 2xy \\ (x - y) {}^{2} = {x}^{2} + {y}^{2} - 2xy \\ {x}^{2} - {y}^{2} = (x + y)(x - y)$

Answer 2

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