Question

expand the following.(5A + 6b)^2.​

Answer 1

${(5a + 6b)}^{2} \\ \\ = {5a}^{2} + 2(5a)(6b) + {6b}^{2} \\ = {5a}^{2} + 2 \times 30ab + {6b}^{2} \\ = {5a}^{2} + 60ab + {6b}^{2}$

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