Question

What are the approximate solutions of 2x^2 + 9x = 8 to the nearest hundredth?

x ≈ 1.22 and x ≈ 3.28

x ≈ −0.76 and x ≈ 5.26

x ≈ −1.22 and x ≈ −3.28

x ≈ −5.26 and x ≈ 0.76

Answer 1

Use the quadratic equation.

Answer 2

2nd one ?

Answer 3

4th one.

Answer 4

r u sure

Answer 5

Yes.
From Mathematica 8:
\[\text{NSolve}[2x{}^{\wedge}2+9x\text{ = }8 ,x]\to \{\{x\to -5.2604\},\{x\to 0.760399\}\} \]