For questions 1-2, apply the quadratic formula to find the roots of the given function, and then graph the function.

1. (6 points) 0 = 3x^2 + 18x + 22

2. (6 points) 0 = -2x^2 + 8x - 3

Question

For questions 1-2, apply the quadratic formula to find the roots of the given function, and then graph the function.

1. (6 points) 0 = 3x^2 + 18x + 22

2. (6 points) 0 = -2x^2 + 8x - 3

anonymous · Answer

1)
x= [- 18 +- sqrt(18^2 - 4*3*22) ]/(2*3)
x=(-18+-7.7459)/6


2)
x= [-8 +- sqrt(8^2-4*-2*-3)]/(2*-2)
x= (-8 +- 6.3245)/(-4)

that is your answer!

anonymous · Answer

dont i get 2 ys and 2 xs to graph?

anonymous · Answer

yes! look at the '+-'.
Just make math to get it!

anonymous · Answer

im sorry i dont understand these ]:  or the way you put it.

anonymous · Answer

first you calculate using '+'. you find first x.
then calculate using '-' and you get the second x!

anonymous · Answer

x1=(-18+7.7459)/6
x2=(-18-7.7459)/6

anonymous · Answer

um.....ok....

anonymous · Answer

y =0 in both case because to their x values, the function value is zero.

Thats x is called as zeros of function

anonymous · Answer

but im getting $$x \approx-1.71,-4.29$$