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Solve the following quadratic equations ...

Solve the following quadratic equations by factorisation method:
`x^(2)+x-20=0`

Text Solution

Verified by Experts

The correct Answer is:
5, 4 are the roots of the given quadratic equation.
`x^(2)+x-20=0`
`:.x^(2)+5x-4x-20=0`
`:.x(x+5)-(x+5)=0`
`:.(x+5)(x-4)=0`
`:.x+5orx-4=0`
`:.x=-orxx=4`
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