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Addition and Subtraction of Algebraic Expression

Subtract the ...

Question

Subtract the second polynominal from the first polynomial:
${5 x}^{2} - 2 y + 9; {3 x}^{2} + 5 y - 7$

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Solution

$= 3 x^{2} + 5 y - 7 - (5 x^{2} - 2 y + 9)$
$= 3 x^{2} + 5 y - 7 - 5 x^{2} + 2 y - 9$
$= - 2 x^{2} + 7 y - 16$

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