Find the zeros:
3x^2 - 22x -16 = 0
i fixed it
but please explain

Question

precal · Answer

use the quadratic formula.  a=3 b=-22 c=-16

anonymous · Answer

to find the zeros? or the xs?

precal · Answer

your xs are called zeros.  That is where the graph crosses the x-axis.

precal · Answer

by the way x=8 and x=(-2/3)

precal · Answer

You could also factor it and solve for the zeros.
Factor is (x-8)(3x+2)

anonymous · Answer

ok i didnt know you could use the quadratic formula, so if you factored what would you do after that?

precal · Answer

Quadratic formula works 100% of the time. Factoring does not always work.  You could be given a quadratic that can not be factored but the quadratic formula will give you the solution since those solutions are complex solutions.

precal · Answer

After you factor, set each one equal to zero and solve for it.
$$x-8=0$$
x=8
$$3x+2=0$$
x=(-2/3)

anonymous · Answer

thank you so much!! this is more help then my teacher, and thanks for the quadratic tip im in pre-calc, and i didnt know that

precal · Answer

Anytime.  Don't be afraid to ask your teacher for help.  Learn to factor because it is faster to factor (if possible) then to use the quadratic formula.
I only use the quadratic formula when the factoring is not obvious.
Use your graphing calculator to double check your solutions.
In other words, make sure those x values give you a zero y value.