3x^2-6x-9
State the coordinates of the x-intercepts
show work.
2 answers
-3 and 1
Y = 3x^2-6x-9 = 0.
A*C = 3 * -9 = -27. sum = 3 + (-9) = -6
= B.
3x^2 + (3x-9x) - 9 = 0.
Form two factorable binomials:
(3x^2+3x) - (9x+9) = 0.
3x(x+1) - 9(x+1) = 0.
(x+1)(3x-9) = 0.
x+1 = 0, X = -1.
3x-9 = 0, 3x = 9, X = 3.
Intercepts = -1, and 3.
A*C = 3 * -9 = -27. sum = 3 + (-9) = -6
= B.
3x^2 + (3x-9x) - 9 = 0.
Form two factorable binomials:
(3x^2+3x) - (9x+9) = 0.
3x(x+1) - 9(x+1) = 0.
(x+1)(3x-9) = 0.
x+1 = 0, X = -1.
3x-9 = 0, 3x = 9, X = 3.
Intercepts = -1, and 3.
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