Question

find the sum of 2xsquare-3y square, 9xsquare+6ysquare,-3x square-5y square
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Answer 1

Answer:

$8 {x}^{2} - 2 {y}^{2}$

Step-by-step explanation:

The required sum is

$2 {x}^{2} - 3 {y}^{2} + 9 {x}^{2} + 6 {y}^{2} - 3 {x}^{2} - 5 {y}^{2} \\ = {x}^{2} (2 + 9 - 3) + {y}^{2} ( - 3 + 6 - 5) \\ = 8 {x}^{2} - 2 {y}^{2}$

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