Question

Subtract -6y² from y² 


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Answer 1

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${y}^{2} - ( - 6 {y}^{2} ) \\ \\ = {y}^{2} + 6 {y}^{2} \\ \\ = 7 {y}^{2}$

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Answer 2

y2−(−6y2)=y2+6y2=7y2