SOLUTION: solve the following by factoring: 5t squared - 10t = 0 x squared - 3x - 10 = 0 if f(x) = 3x squared + 5x -2 find f(-2) f(4) solve 3x squared + 19x

SOLUTION: solve the following by factoring: 5t squared - 10t = 0 x squared - 3x - 10 = 0 if f(x) = 3x squared + 5x -2 find f(-2) f(4) solve 3x squared + 19x - 14 = 0 u

Question 137421: solve the following by factoring:
5t squared - 10t = 0
x squared - 3x - 10 = 0
if f(x) = 3x squared + 5x -2 find
f(-2)
f(4)
solve
3x squared + 19x - 14 = 0 using quadratic formula.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve by factoring:
1)
Factor out 5t from each term:
Now apply the zero products rule;
and/or
If then
If then
2)
Factor the trinomial.
Apply the zero products rule.
and/or
If then
If then
3)
find: f(-2). Just substitute -2 everywhere there is an x in the function.
Simplify.

Find: f(4)

4) Solve for x using the quadratic formula:
Here, a = 3, b = 19, and c = -14. Making the appropriate substitutions, we get:
Simplify this:

or
or
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