Question

expand the following : 1.(x+2y+3z)²
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Answer 1

Step-by-step explanation:

this is the solution

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Answer 2

Answer:

we know that,

${(a + b + c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ac \\ {(x + 2y + 3z)}^{2} = {x}^{2} + 4 {y}^{2} + 9 {z}^{2} + 4xy + 12yz + 6xz$

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