We have #x2212; x 2 +x #x2212;2=0 . Any equation of the form a x 2 +bx+c=0 has the solution x= #x2212;b #x00B ...

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Quadratic Formula for Finding Roots

4.-x2 +x-2=0

Question

4.-x2 + x-2=0

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Solution

We have − x 2 +x−2=0 .

Any equation of the form a x 2 +bx+c=0 has the solution

x= −b± D 2a

Here, D= b 2 −4ac is called the discriminant of the quadratic equation.

x= −1± 1−4×( −1 )×( −2 ) −2 = −1± −7 −2

Thus, x= 1± 7 i 2 .

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