Question

expand (-2x+5y-3y)² using suitable identities
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Answer 1

${\huge \underline{\mathfrak\green{hy \:mate}}}$

$\huge\underline\bold \red {AnswEr : }$

we are using identity (-a+b-c)² = a²+b²+c²-2ab-2bc+2ca

so,

(-2x+5y-3z)² = (-2x+5y-3z) (-2x+5y-3z)

4x²+25y²+9z²-20xy-30yz+12zx

_______proof_______

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