What are the approximate solutions of 2x2 + 9x = 8 to the nearest hundredth?

+ 9x = 8       Subtract 8 from both sides
+ 9x -8 = 0   Plug these into the Quadratic Formula

a = 2 , b = 9 , c = -8

x =   Plug in the values
x =   Multiply 2 and 2
x =   Multiply -4 and 2
x =   Multiply -8 and -8
x =   Square 9
x =   Add 81 and 64
x = Take apart the (+ or -)
x = and    Find the square root of 145
x ≈  or   Add -9 and the decimal , Subtract -9 and the decimal
x ≈  or   Divide both fractions
x ≈ 0.7603986447 or -5.2603986447   Round to the nearest hundredth (_._x)
x ≈ 0.76 or -5.26

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8