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What is the quadratic formula to find any x-intercepts for this equation?

y=4x^2 - 5x -4
 
 
x=?

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Don L. | Don - Math/Science Tutor from Elementary School to College levelDon - Math/Science Tutor from Elementary...
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based on the quadratic formula: x= (-b ±√(b^2 - 4ac))/2a

x = [5 ± √(25-(4)(4)(-4))]/2(4) = [5 ± √(89)]/8