JadeCaldwell
01.02.2020 •
Mathematics
Algebraically determine the x-intercepts of this function. show work.
y=x^4 - 10x^2 + 9
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Ответ:
x^4 - 10x^2 + 9 = 0
x^4 - 9x^2 - x^2 + 9 = 0
x^2(x^2 - 9) - 1(x^2 - 9) = 0
(x^2 - 9)(x^2-1) =0
x^2 - 9 = 0
⇒ x^2 = 9
⇒x = +3, -3
x^2 - 1 = 0
x^2 = 1
x = +1, -1
X intercepts are -3, -1, 1, 3
Ответ:
y-intercept
:)