# Algebra

posted by .

Determine the zeros of the function 3x^2 -8=10x. I know I rewrite it as 3x^2 -10x-8 = 0

But then what do I do-I'm totally confused-Answers are
{-2,4}
{2,4}
{-2/3,4}
{2/3,4}
Please direct me or show the steps, just don't give me the answer because I still won't get it.
Thank you

• Algebra -

What factors does 8 have (8,1 or 4,2?) that, when one is multiplied by 3, will add/subtract to get -10?

4*3 = 12, when you subtract 2 from that product, that give you 10. Just make sure you get the signs right.

(3x+2)(x-4) = 0

## Similar Questions

1. ### how about his one

-7+ 5x = 10x-2? im not sure I know its -1, but im not sure how. -7 + 5x = 10x - 2 Since we need to get the unknowns on one side and the knowns on the other side and change their signs: 5x - 10x = 7 - 2 -5x = 5 x = -1 wait how did you
2. ### Decartes Rules

Use Decartes Rule of signs to determine the possible number of postive and negative real zeros for the given function. Please check my answers?
3. ### Algebra HELP!

Consider the function h as defined. Find functions f and g so (f o g)(x)=h(x) h(x)=8/x^2+10 I think it is: h(x)=8/x^2+10 h(x)=8/x^2+10*x^2/x^2 h(x)=8/x^2+10x^2/x^2 h(x)=8+10x^2/x^2 h(x)=10x^2+8/x^2 h(x)=2(5x^2)+2(4)/x^2 h(x)=2(5x^2+4)/x^2
4. ### Algebra I

Thanks Reiny, but I'm still lost. I understand how you multipled by 10X on the right to get 17x, but you went too fast on the left, and I have no idea how you got 10x^2-20 from the starting left side. Can you show each step?

6. ### Math

Determine the zeros of the function 3x^2 -8=10x. I know I rewrite it as 3x^2 -10x-8 = 0 But then what do I do-I'm totally confused-Answers are {-2,4} {2,4} {-2/3,4} {2/3,4} Please direct me or show the steps, just don't give me the …
7. ### Intermediate Algebra

Determine whether the point (1, 8) is a solution of the system 2x + 6y = 50 10x + 0y = 10 by substituting the point into each equation. So far I have: 2x=6y=50 y=50-2x 10x+10y=10 10x+0(50-2x)=10 10x+0=10 x=10 y=50-2x y=50-2(1) y=50-2 …
8. ### college algebra

1. solve the following logarithmic equation log_8(x+8)+log_8(x+7)=2 what is the exact solution 2.se the rational theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers. f(x)=4x^4+5x^3+9x^2+10x+2 …
9. ### algebra

Gina wrote this system of linear equations: 2x + y = 7 4x + 5y = 11 Which of the following shows the first four steps that Gina could have used to correctly solve this system for x?
10. ### Math

Rewrite the expression using the Distributive Property. 5(2x-8) a. -30x b. 10x-40*** c. 10x+40 d. 10x-8

More Similar Questions