Question

Explain the equation ( 2x+5y-3z)2

Answer 1

$\bf \huge \red {Answer }$

$\bf \: ( 2x+5y-3z)^{2}$

$\bf \: By \: using \: Identity \: :- \bigg(x+y+z \bigg)^{2} = x² + y² + z² + 2xy + 2yz + 2zx$

$\bf \bigg(2x + 5 - 3z \bigg)^{2} \: = \: {(2x)}^{2} + {5y}^{2} + { - 3z}^{2} + 2 \times 2x \times 5y \: + 2 \times 5y \times ( - 3z) \: + 2 \times ( - 3z) \times 12x$

$\bf \: {4x}^{2} + {25y}^{2} + {3z}^{2} + 20xy - 30yz - 12zx \:$

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