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May 19, 2013

# Homework Help: algebra2

Posted by logan on Tuesday, January 29, 2008 at 9:21pm.

-4t^2-9t-3=0

thank you so much for helping..if u can do this and help me then i can do the rest of my homework....i hope..lol

• algebra2 - DanH, Tuesday, January 29, 2008 at 9:51pm

This looks like a "prime" quadratic. With trial and error trying:

(-4t )(t )

or

(-2t )(t )

you cannot get it to work. So there are no "interger" solutions. You can use the famous "quadratic equation" to get an approximation. ARe you familiar with this?

• algebra2 - sheila, Tuesday, January 29, 2008 at 10:05pm

this is a quadratic formula...i need to solve it using the quadratic formula!!

• algebra2 - DanH, Tuesday, January 29, 2008 at 10:16pm

ok. I assume you know the quadratic formula. It is hard to write it here. In your example, a = -4, b = -9 and c = -3. So, when you plug these in, you end up with (9+sqrt43)/8 and
(9-sqrt43)/8

this is approx: 15.56/8 and 2.44/8. These are your 2 solutions.

• algebra2 - DanH, Tuesday, January 29, 2008 at 10:22pm

woops...slight mistake.

It's actually: (9+sqrt33)/8 and
(9-sqrt33)/8

or 14.74/8 and 3.26/8.

• algebra2 - Damon, Tuesday, January 29, 2008 at 10:27pm

-b = 9 all right
but 2a = -8
so
-b/2a = -9/8 not +

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