solve the folowing quadratic equation by factorizition method X^2+X-20=0
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Answered by
2
Solution:-
Method 1
:- Given equation
=> x² + x - 20
Split into middle term
=> x² + 5x - 4x - 20 =0
=> x( x + 5 ) - 4( x + 5 ) = 0
=> ( x - 4 )(x + 5 ) = 0
=> x - 4 = 0 and x + 5 = 0
=> x = 4 and x = - 5
So value of x is 4 and - 5
Method :- 2
By Quadratic formula
We have equation
=> x² + x - 20
Compare with :- ax² + bx + c = 0
So
:- a = 1 , b = 1 and c = - 20
put the value on formula
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