Factor 2x3+5x2−8x−20=02x^3 + 5x^2 - 8x - 20 = 02x3+5x2−8x−20=0 and find all real roots.
x=−2,2,−5/2x = -2, 2, -5/2x=−2,2,−5/2
x=−1,1,5/2x = -1, 1, 5/2x=−1,1,5/2
x=−4,4,1x = -4, 4, 1x=−4,4,1
x=3,−3,2x = 3, -3, 2x=3,−3,2