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Write the equation for the parabola that has x− intercepts (−2,0) and (1.2,0) and y− intercept (0,−4)

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  1. since you have the roots, you know that
    y = a(x+2)(x - 6/5)
    since y(0) = -4,
    a(2)(-6/5) = -4
    a = -4 * -5/12 = 5/3
    so,
    y = 5/3 (x+2)(x - 6/5)
    = 1/3 (x+2)(5x-6)

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