Question

makr a small dairy on (formulas)​

Answer 1

1.

$(a + b) ^{2} = {a}^{2} + {b}^{2} + 2ab$

2.

$(a - b) ^{2} = {a}^{2} + {b}^{2} - 2ab$

3.

${a}^{2} - {b}^{2} = ( a - b)(a + b)$

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