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Use the discriminant to determine how many x-intercepts the graph of the equation has.



y = – 4x2 + 3x + 2

A.
zero


B.
one

C.
two


D.
three

Respuesta :

y = – 4x² + 3x + 2
a= - 4, b =3, c=2

Formula for discriminant is
D = b² - 4ac.
D= 9-4*(-4)*2=9+32=41 >0
We see that discriminant is positive (more than 0), so this equation has 2 roots.
Answer is C. two.

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