SOLUTION: I am having trouble factoring trinomials. Can you help me with the following problems:1. 2a^2-a-15;2.30c^2+19c-63:3.20c^2-13c-15;5c^2+18c-35. I have been working on them for two da

Question 317455: I am having trouble factoring trinomials. Can you help me with the following problems:1. 2a^2-a-15;2.30c^2+19c-63:3.20c^2-13c-15;5c^2+18c-35. I have been working on them for two days and can not get them factored out completely, I get so far and still get the wrong answers.
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
2a^2-a-15

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=121 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 3, -2.5. Here's your graph:

2.30c^2+19c-63

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=940.6 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 2.53678321601785, -10.7976527812352. Here's your graph:

3.20c^2-13c-15

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=361 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 5, -0.9375. Here's your graph:

5c^2+18c-35

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=1024 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 1.4, -5. Here's your graph:

RELATED QUESTIONS
Factor... (answered by ewatrrr)

I am having trouble factoring the following problems: 256^4+64-80b and 81s^2-64 can you... (answered by privani)

I am having trouble factoring the following equation:... (answered by richwmiller)

I need to factor this trinomial completely???? 2a^3 - 52a^2b + 96ab^2. I am having a lot... (answered by Earlsdon)

Hello, I am having trouble with Factoring using algebra tile can you please help me. 1. (answered by Alan3354,Edwin McCravy)

I am having difficulty factoring trinomials, could you please help me with this problem? (answered by srinivas123)

factor completely 7a^2-7a-84 I am having trouble with factoring can you please... (answered by Alan3354)

Factoring Strategy-Factor Com[pletely Tutor, I am having trouble with tougher problems (answered by jsmallt9)

I am having trouble with word problems. The questions is: Separate 180 into two parts so... (answered by lwsshak3,nerdybill)