## Krissy11 3 years ago How would I solve 75+3x^2?

1. apple_pi

perhaps you mean 75+3x^2 = 0?

2. hartnn

to solve u need some equality....

3. Krissy11

yes thats what I mean

4. apple_pi

Ok, rearrange to get x on its own: 3x^2 = -75 x^2 = -25 x = √-25 which is not a real number

5. apple_pi

Did you mean 75x+3x^2 = 0?

6. lgbasallote

let's just mean everything shall we

7. lgbasallote

i think it's just asking to factor out 75 + 3x^2

8. justindrake

Start with the given expression Factor out the GCF 3 Now let's focus on the inner expression ------------------------------------------------------------ Looking at we can see that the first term is and the last term is where the coefficients are 1 and 25 respectively. Now multiply the first coefficient 1 and the last coefficient 25 to get 25. Now what two numbers multiply to 25 and add to the middle coefficient 10? Let's list all of the factors of 25: Factors of 25: 1,5 -1,-5 ...List the negative factors as well. This will allow us to find all possible combinations These factors pair up and multiply to 25 1*25 5*5 (-1)*(-25) (-5)*(-5) note: remember two negative numbers multiplied together make a positive number Now which of these pairs add to 10? Lets make a table of all of the pairs of factors we multiplied and see which two numbers add to 10

9. lgbasallote

lol looks the same answer as the one here http://www.algebra.com/algebra/homework/Polynomials-and-rational-expressions/Polynomials-and-rational-expressions.faq.question.142171.html i think @jim_thompson5910 wrote it =)))

10. lgbasallote

and fyi @justindrake that problem is so different from this one =))))

11. ParthKohli

What a coincidence! Wow! Jim_Thompson!

12. justindrake

13. Krissy11

the problem reads 75+3x^2=0. so i move the 3x^2 to the other side is that what you said?

14. lgbasallote

15. justindrake

@lgbasallote yeah

16. Krissy11

What? ^

17. Krissy11

18. justindrake

yeah my ans is right

19. Krissy11

Okay is it the one where you typed the paragraph?

20. Krissy11

Can you type how I'm supposed to start it plz?

21. farmdawgnation

@justindrake Please don't copy and paste answers from other sites and make small tweaks. Thanks.

22. justindrake

@farmdawgnation im not copying and pasteing the ans from website im copying it from my brain i dont know that this site have ans to