SOLUTION: Find the zeroes of the function algebraically f(x) =2x2-3x-20

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Question 1031481: Find the zeroes of the function algebraically f(x) =2x2-3x-20
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Try to factorize the function if possible; or look at discriminant:







If you use general solution for quadratic expression,
zeros are

or

The two zeros.
Answer by MathTherapy(10551)   (Show Source): You can put this solution on YOUR website!

Find the zeroes of the function algebraically f(x) =2x2-3x-20


(2x + 5)(x - 4) = 0

2x + 5 = 0      OR      x - 4 = 0

2x = - 5        OR      x = 0 + 4 

 

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