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29 May, 13:56

What is the polynomial 3y^2 + (y+7) ^2-15 after it has be simplified

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  1. 29 May, 15:06
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    4y^ (2) + 14y+31

    Step-by-step explanation:

    First you need to do (y+7) (y+7)

    y^2+7y+7y+49

    y^2+14y+49

    Add it all together

    y^2+14y+49+3y^2-15

    4y^ (2) + 14y+31
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