Question

please tell...........​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

$4x ^{2} - xy - 2 ^{2} - 2x ^{2} - 5xy + 3y^{2} \\ lets \: change \: the \: signs \: of \: - 2x ^{2} - 5xy + 3y ^{2} = - 2x ^{2} + 5xy - 5y ^{2} \\ so \: we \: get \: = 2x ^{2} + 4xy - 5y ^{2} is \: your \: answer$