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

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

Soren solves the quadratic equation x^2 + 8x – 9 = 0 using the quadratic formula. In-example-1
asked
User Jiri Vlasimsky
by
7.6k points

1 Answer

1 vote

Answer:

step 3 didn't divide by 2

Explanation:

in step


( - 8 + √(100) )/(2) = ( - 8 + 10)/(2) = 1 \\ ( - 8 - √(100) )/(2) = ( - 8 - 10)/(2) = - 9

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User Xskxzr
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