Question

Expand(2x+3y+4z)² in simple way

Answer 1

4x^2 + 9y^2 +16z^2 (without using identities)

and with identities....

4x^2 + 9y^2 +16z^2 +2(2x)(3y) +2(3y)(4z)

+2(4x)(2z)

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Answer 2

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Step 1-

Using identity

$( {a + b + c})^{2}$

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

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