What value of g makes the equation true? (x+7)(x-4)= x2 + QX-28

Adi Sembiring asked Jul 5, 2023

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Adi Sembiring asked Jul 5, 2023

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21 votes

$\mleft(x+7\mright)\mleft(x-4\mright)=xx+x\mleft(-4\mright)+7x+7\mleft(-4\mright)=xx-4x+7x-7\cdot\: 4$

simplifying

therefore the value of Q is 3

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