# Math

posted by .

how do you factor 2c^2-7c=-5? I know that you have to change it to 2c^2-7c+5=0. Then you do this: (2c )(c ). But how do I find the two numbers? I can't think of one that works..

• Math -

Since 5 is a prime number, it can only be factored into 1 and 5. To add to -7, they both need to be negative. Which factor needs to be multiplied by 2 to get the sum of -7 for the middle term?

I hope this helps. Thanks for asking.

• Math -

I don't think there is any factor that can be multipl;ied by 2 to get -7..

## Similar Questions

1. ### algebra

this is what u do on your first problem....first u take out the greatest common factor that would go into all of them... 4n^2-20n+24...now what number will go into all of them...well 4 will...4 will go into 4,20,and 24...so. it would …
2. ### Math

Does the equation square root of x^2 + 3X= x-3 have no solution because I think there isn't one?

25-x^2 6x^2 ------ * ------ 12 2x *I got: 5-x/2 No. Try again. Can you tell me what I did wrong please.?
4. ### math,help,factoring

i need help i don't know how to do the next step. factor by grouping x^3-3x^2+4x-12 so what i have so far is this =(x^3-3x^2)+(4x-12) =x(x^2-3x)+4(x-3) from here i don't know... and then this one is driving me insane this next one... …
5. ### coomon factors

I don't understand common factors. can someone show me how to find the greatest common factor of 385 and 1365?
6. ### MATH

The sum of the squares of two numbers is 2. The product of the two numbers is 1. Find the numbers. xy=1 x^2+y^2=2 x^4+1=2x^2 x^4-2x^2+1=0 I don't think you can factor that unless its (x^2+1)(x^2-1) but I don't know where to go from …
7. ### math

How do the ideas of divisibility and multiples relate to the study of fractions?
8. ### math

(1)Robert is thinking of two numbers. Their greatest common factor is 6. Their least common multiple is 36. One of the numbers is 12. What is the other number Answer: 18 please help Ms.Sue I think the answer is right not sure how I …
9. ### math

Can two numbers have more than one greatest common factor(GCF)?
10. ### science help

Two factors which cause global climate change are listed below. Factor 1: Volcanic eruptions. Factor 2: Changes in the amount of Sun’s heat received by the Earth’s atmosphere and surface. Which of these statements is correct about …

More Similar Questions