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gizmo_the_mogwai [7]
3 years ago
9

Soren solves the quadratic equation x^2 + 8x – 9 = 0 using the quadratic formula. In which step did Soren make an error?

Mathematics
1 answer:
pochemuha3 years ago
8 0

Answer:

step 3 didn't divide by 2

Step-by-step explanation:

in step

\frac{ - 8 +  \sqrt{100} }{2}  =  \frac{ - 8 + 10}{2}  = 1 \\  \frac{ - 8 -  \sqrt{100} }{2}  =  \frac{ - 8 - 10}{2}  =  - 9

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