Question 1 Report
Find the roots of x3 3 - 19x - 30=0
Answer Details
x3 - 19x - 30
test x = 553 3 −19(5) − 30 = 125 − 95 − 30 = 0
(x - 5) is a factor.
x3 - 19x - 30 divided by (x - 5) = x2 + 5x + 6
factorizing x2 2 + 5x + 6, we have (x+2)
(x+2)(x+3)(x - 5) = 0
x = -2, -3, and 5.
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