Which value is a root of 2x3−5x2−4x+3=02x^3 - 5x^2 - 4x + 3 = 02x3−5x2−4x+3=0?
x=1x = 1x=1
x=−1x = -1x=−1
x=3x = 3x=3
x=12x = \frac{1}{2}x=21