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What are the x-intercepts of the quadratic function? y = x2 – 3x + 2
A) 2 and 1
B) –2 and 1
C) 2 and –1
D) 1

Respuesta :

a5904640

y = x² - 3x + 2


The x-intercepts can be take by matching the equation to 0, so,


x² - 3x + 2 = 0


Δ = b² - 4.a.c

Δ = -3² - 4 . 1 . 2

Δ = 9 - 4. 1 . 2

Δ = 1

There 2 real roots.


x = (-b +- √Δ)/2a


x' = (--3 + √1)/2.1

x'' = (--3 - √1)/2.1


x' = 4 / 2

x'' = 2 / 2


x' = 2

x'' = 1


Alternative A.


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