Question

I find the square 9x+ 8y​

Answer 1

$(9x + 8y) {}^{2} = 81x {}^{2} + 64y {}^{2} + 144xy$

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Answer 2

${(9x + 8y)}^{2} \\ {(9x)}^{2} + {(8y)}^{2} + 2(9x)(8y) \\ 81 {x}^{2} + 64 {y}^{2} + 144xy$