Monday

December 22, 2014

December 22, 2014

Posted by **Scotty** on Wednesday, June 2, 2010 at 11:17am.

A.(-6, 3)

B. (-3, 6)

c.(-∞, -6)∪(3, ∞)

D. (-∞, -3)∪(6, ∞)

- Algebra -
**Jen**, Wednesday, June 2, 2010 at 11:18amFind two numbers that multiply to negative 18 and add to 3. (x+6)(x-3)

- Algebra -
**Scotty**, Wednesday, June 2, 2010 at 11:24amthankyou but, so what would you say the answer is a,b,c or d?

- Algebra -
**MathMate**, Wednesday, June 2, 2010 at 12:43pmIf you sketch the curve f(x) = x²+6x-18=0, it will be concave upwards, which means that if the curve cuts the x-axis, the domain of the function f(x)<0 will be between the two roots of f(x)=0. Thus c and d are not appropriate answers.

Jen already factorized f(x)=(x+6)(x-3).

You will need to find the value of the roots (where the curve cuts the x-axis) and find the appropriate response.

If you need help understanding the interval notation, please post.

**Answer this Question**

**Related Questions**

Math - State the range of the function: f(x) = 5ex + 1 A) (0, ∞) B) (1...

math - Determine the concavity in the graph of f (x) = -4x^3 + 8x^2 + ax + b, ...

maths - A sequence is defined by un = 2×(−0.5)n + 3 (n = 1,2,3, . . .). ...

maths - A sequence is defined by un = 2×(−0.5)n + 3 (n = 1,2,3, . . .). ...

Math - which interval notation would go with this equation -5(4x - 14) ≥ -...

Calculus - Find the indicated limits. If the limit does not exist, so state, or ...

Calculus - Find the indicated limits. If the limit does not exist, so state, or ...

Math - Can someone help me with these T.T 1.Which polynomial function would have...

Calculus/Physics? - Define a function f(v)={c:v€[0,v(subscript)0) 0 : v€ [v(...

Calculus - 7) Consider the function f(x)=x2e4x. For this function there are ...