# pre-calculus

posted by .

solve the the following inequality. write your solution in interval notation.

x^3-49x<0
_ (I don't know how to make the sign on my computer)

• pre-calculus -

x^3 - 49x < 0
x(x^2 - 49) < 0
x(x+7)(x-7) < 0

consider f(x) = x(x+7)(x-7)
the x-intercepts would be -7, 0, 7

Knowing the basic shape of a cubic, we have
x < -7 OR 0 < x < 7

I will let you write that in the interval notation that you learned.

## Similar Questions

1. ### pre-calculus

please help me with thisone thanks solve the inequality algebraically. Express the solution in interval notation. (x-8)^2/x^2-36 > 0
2. ### Solve Inequality

Solve the inequality. Express your solution using interval notation and please show all of your work. x(x + 6)(8 – x) >= 0 I need help, I guess I'm not understanding the interval notation portion. I know, that when 0 <= x <= …
3. ### pre calculus

Solve the following inequality and write using interval notation x^2 - 22/ x -4 >_ -7/2 this sign > has the slash underneath Help me!
4. ### pre-calculus

solve for the follow inequality. write your solution in interval notation. x^3-49x¡Ü0

6. ### math

solve the following inequality. write your solution in interval notation x^3-49x<=0
7. ### calculus

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0
8. ### calculus

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work
9. ### calculus

use a sign chart to solve inequality. Express answers in interval notation. x^2+6<2x
10. ### pre cal

Solve the following inequality. Write the answer in interval notation. x^4>4x^2

More Similar Questions