Question

subtract 4x^2- 5x^2y + y^2 from - 3y^2 + 5xy^2 - 7x^2 - 9x^2y
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Answer 1

Answer:

${3x}^{2} + {5xy}^{2} - {7x}^{2} - {9x}^{2} y$

${4x}^{2} \: \: \: \ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: + {5x}^{2} y + {y}^{2} \: \: \:$

$change \: the \: sign \: of \: {2}^{nd} \: term$

$- {x}^{2} + {5xy}^{2} - {7x}^{2} - {14x}^{2} y - {y}^{2}$