Use the quadratic formula to find the roots of the equation. Round to tenths place if necessary.

11x2 - x - 3 = 0

A. {-1, 1.2}
B. {-11, 13.2}
C. {-0.5, 0.6}
D. no real solution

Question

Use the quadratic formula to find the roots of the equation. Round to tenths place if necessary.

11x2 - x - 3 = 0

A. {-1, 1.2}
B. {-11, 13.2}
C. {-0.5, 0.6}
D. no real solution

anonymous · Answer

$$\frac{1\pm\sqrt{133}}{22}$$

anonymous · Answer

c is closest

anonymous · Answer

Okay but its not positive? thats weird.. :P

anonymous · Answer

it is just not exact.  it is right to the nearest tenth.

gw2011 · Answer

Quadratic formula:

x=[-b+/- square root (b^2-4ac)]/2a

a=11
b=-1
c=-3

Substituting these into the formula, you get the answer as:

x=[1+/- square root (133)]/22
square root 133=11.5 approximately

(1+11.5)/22 and (1-11.5)/22
=12.5/22 and -10.5/22
=0.56 and -0.5

So, the closest answer is (c)=-0.5, 0.6