Answer:
I think the area is 24
Step-by-step explanation:
Answer:
![\large\boxed{(x^2+4x+8)(2x-1)=2x^3+7x^2+12x-8}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%28x%5E2%2B4x%2B8%29%282x-1%29%3D2x%5E3%2B7x%5E2%2B12x-8%7D)
Step-by-step explanation:
Use FOIL: <em>(a + b)(c + d) = ac + ad + bc + bd</em>
![(x^2+4x+8)(2x-1)\\\\=(x^2)(2x)+(x^2)(-1)+(4x)(2x)+(4x)(-1)+(8)(2x)+(8)(-1)\\\\=2x^3-x^2+8x^2-4x+16x-8\qquad\text{combine like terms}\\\\=2x^3+(-x^2+8x^2)+(-4x+16x)-8\\\\=2x^3+7x^2+12x-8](https://tex.z-dn.net/?f=%28x%5E2%2B4x%2B8%29%282x-1%29%5C%5C%5C%5C%3D%28x%5E2%29%282x%29%2B%28x%5E2%29%28-1%29%2B%284x%29%282x%29%2B%284x%29%28-1%29%2B%288%29%282x%29%2B%288%29%28-1%29%5C%5C%5C%5C%3D2x%5E3-x%5E2%2B8x%5E2-4x%2B16x-8%5Cqquad%5Ctext%7Bcombine%20like%20terms%7D%5C%5C%5C%5C%3D2x%5E3%2B%28-x%5E2%2B8x%5E2%29%2B%28-4x%2B16x%29-8%5C%5C%5C%5C%3D2x%5E3%2B7x%5E2%2B12x-8)
Answer:
5.5! Now, you need to know why. The total cost was $490, there is a fee of $50, so subtract the fee from the total cost and you should then divide that by $80 because thats how much it is an hour.
This is not a polynomial equation unless one of those is squared. As it stands x=-.833. If you can tell me which is squared I can help solve the polynomial.
Ok, that is usually notated as x^3 to be clear. I'll solve it now.
x^3-13x-12=0
Then use factor theorum to solve x^3-13x-12/x+1 =0
So you get one solution of x+1=0
x=-1
Then you have x^2-x-12 now you complete the square.
Take half of the x-term coefficient and square it. Add this value to both sides. In this example we have:
The x-term coefficient = −1
The half of the x-term coefficient = −1/2
After squaring we have (−1/2)2=1/4
When we add 1/4 to both sides we have:
x2−x+1/4=12+1/4
STEP 3: Simplify right side
x2−x+1/4=49/4
STEP 4: Write the perfect square on the left.
<span>(x−1/2)2=<span>49/4
</span></span>
STEP 5: Take the square root of both sides.
x−1/2=±√49/4
STEP 6: Solve for x.
<span>x=1/2±</span>√49/4
that is,
<span>x1=−3</span>
<span>x2=4</span>
<span>and the one from before </span>
<span>x=-1</span>