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What are the x intercepts of the parabola y equals x squared -5x plus 3?
Ihatekumon
y = X^2 - 5X + 3 ( set = to 0 )
X^2 - 5X + 3 = 0
Use the quadratic formula. X = -b +/- sqrt(b^2-4ac)/2a
a = 1
b = -5
c = 3
X = -(-5) +/- sqrt[(-5)^2 - 4(1)(3)]/2(1)
X = 5 +/- sqrt(13)/2
X= 4.302775638
X = 0.6972243623
ugly but true. my TI-84 confirms this answer. Probably use the exact answer.
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∙ 13y ago
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