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16 June, 09:30

Solve for z: z2 + 7z + 8 = 3z + 5

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  1. 16 June, 12:51
    0
    z=-1 or z=-3

    Step-by-step explanation:

    Subtract 3z + 5 from both sides

    z2+7z+8 - (3z+5) = 3z+5 - (3z+5)

    z2+4z+3=0

    Factor left side of equation

    (z+1) (z+3) = 0

    Set factors equal to 0

    z+1=0 or z+3=0

    z=-1 or z=-3
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