Question

What are the answers to these using the quadratic formula?

Answer 1

1. Solve 3x2 + 4x = 2

2. If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? Use the equation h = –16t2 + 64t + 4.

3. Solve x2 + 9x + 9 = 0.

4. Solve 2x2 = 14x + 20.

Answer 2

Whoops, the variables with a two after them is the exponent. Forgot to put a ^.

Answer 3

1. 3x^2 +4x =2

3x^2 +4x -2 =0

so do you know how you can solving a quadratic equation ?

Answer 4

I know to plug in the numbers using the quadratic formula, but it gets confusing when I need to simplify the square root.

Answer 5

Heres what I have so far:

-4 plus or minue the square root or -16 all over 6.

And I don't even think that's right.

Answer 6

I mean,

-4 plus or minus the square root of -16 all over 6

Answer 7

so what you like saying wann to be formula of discriminant and what have formula

D=sqrt(b^2 -4ac)

yes ?

Answer 8

so and after this you can writing that these roots will be

x_1,2 = (-b +/- sqrt(b^2 -4ac)))/2a

you have thought the same ?

Answer 9

I don't understand? I don't think I've learned anything about discriminants...

Answer 10

so can you write it here ?

Answer 11

ok what you have wrote before little up so can you rewrite it here how you have got it from what formula ?