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12-12-2019
Mathematics

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

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Аноним Аноним

12-12-2019

Answer:

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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