SOLUTION: z^2/2 = z/5 + 7/10

SOLUTION: z^2/2 = z/5 + 7/10

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Question 32546: z^2/2 = z/5 + 7/10
Answer by mukhopadhyay(490) (Show Source): You can put this solution on YOUR website!
z^2/2 = z/5 + 7/10
=> z^2/2 = (2z+7)/10
=> 5z^2 = 2z+7
=> 5z^2 - 2z - 7 = 0
=> 5z^2 - 7z + 5z - 7 = 0
=> (5z+1)(z-7) = 0
=> z=-1/5 or z=7
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