Wednesday

October 22, 2014

October 22, 2014

Posted by **latesha** on Saturday, December 17, 2011 at 8:33pm.

4x3 + 8x2 − 9x − 18 = 0

x = 1 (smallest value)

x = 2

x = 3 (largest value)

- math -
**drwls**, Sunday, December 18, 2011 at 8:21amx = 1 is not a solution. You can easily prove that yourself.

When x = 2,

4x^3 + 8x^2 − 9x − 18 = 28

So that is not a solution, either. Neither is x = 3. How did you come up with your answers?

When x = -2,

-32 +32 +18 -18 = 0

So x+2 is a factor of the polynomial.

The other factor is

(4x^3 + 8x^2 − 9x − 18)/(x+2)

= (4x^2 -9) = (2x +3)(2x-3)

So the other two solutions are

x = 3/2 and x = -3/2

**Answer this Question**

**Related Questions**

math - Use factoring by grouping to solve the following equation. 4x^3 + 8x^2 &#...

biology - Given the part of the molecule shown below, can the underlined atom ...

Math - Went ahead and did the HW the teach recommended but she did not post the ...

Algebra - Which of the following equations containing grouping symbols is ...

Grade 12 Calculus - Evaluate each of the following. Show all your calculations...

calculus - Find an equation for the surface consisting of all points P(x, y, z) ...

calculus (gr 12) - Evaluate each of the following. Show all your calculations. a...

calculus (gr 12) - Evaluate each of the following. Show all your calculations. a...

probability - Let X be a continuous random variable. We know that it takes ...

Math - Simplify: x4 −4x3 −27x+108 ---------------- x3 −3x2 &#...