Question

$(2x + 3y + 4z) {}^{2}$
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Answer 1

Step-by-step explanation:

${x}^{2} + {y}^{2} + {z}^{2} + 2xy + 2yz + 2xz \\ ({2x})^{2} + ({3y})^{2} + ({4z})^{2} + 2(2x)(3y) + 2(3y)(4z) + 2(4z)(2x) \\ 4 {x}^{2} + 9 {y}^{2} + 16 {z}^{2} + 12xy + 24yz + 16xz$

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