SOLUTION: Can you find the x-intercepts for the parabola defined by the equation below? And how do you do it im so confused?
y = 3x^2 + 18x + 15
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Question 586778: Can you find the x-intercepts for the parabola defined by the equation below? And how do you do it im so confused?
y = 3x^2 + 18x + 15
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
the x-intercepts are when y equals zero (also called roots)
0 = 3x^2 + 18x + 15
dividing by 3 ___ 0 = x^2 + 6x + 5
factoring ___ 0 = (x + 5)(x + 1)
x + 5 = 0 ___ x = -5
x + 1 = 0 ___ x = -1
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