Question

Which are solutions to the equation x3 – 5x2 + 2x + 6 = 0? Round each solution to the nearest tenth. Check all that apply.

x = –0.9
x = 0.8
x = 1.7
x = 4.2
x = 6.0

Answer 1

The cubic has three real roots approximately
x ≈ -0.8555, 1.678, 4.1775.
Rounded to the nearest tenth these are x = -0.9, 1.7, and 4.2.

So the correct choices are: x = –0.9, x = 1.7, x = 4.2.