Question

Take away
${2x}^{2} - 5xy \: - {7y}^{2} from \: {5x}^{2} + 2xy - {11y}^{2}$
​

Answer 1

Answer:

$3x^2+7xy-4y^2$

Step-by-step explanation:

$5x^2+2xy-11y^2-(2x^2-5xy-7y^2)\\= 5x^2+2xy-11y^2-2x^2+5xy+7y^2\\= 5x^2-2x^2+2xy+5xy-11y^2+7y^2\\=3x^2+7xy-4y^2$

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