C 91928484848383838388383822
Answer:
40 !
Step-by-step explanation:
ax - x = c Factor out the x
x (a - 1) = c Divide both sides by (a - 1)
x =
Answer:

Step-by-step explanation:
<u>Factoring</u>
We need to recall the following polynomial identity:

The given expression is:

To factor the above expression, we need to find a and b, knowing a^3 and b^3. a is the cubic root of a^3, and b is the cubic root of b^3:
![a=\sqrt[3]{x^6}=x^2](https://tex.z-dn.net/?f=a%3D%5Csqrt%5B3%5D%7Bx%5E6%7D%3Dx%5E2)
![b=\sqrt[3]{64y^3}=4y](https://tex.z-dn.net/?f=b%3D%5Csqrt%5B3%5D%7B64y%5E3%7D%3D4y)
Now we apply the identity:
![x^6– 64y^3=(x^2-4y)[(x^2)^2+(x^2)*(4y)+(4y)^2]](https://tex.z-dn.net/?f=x%5E6%E2%80%93%2064y%5E3%3D%28x%5E2-4y%29%5B%28x%5E2%29%5E2%2B%28x%5E2%29%2A%284y%29%2B%284y%29%5E2%5D)
Operating:
![x^6– 64y^3=(x^2-4y)[x^4+4x^2y+16y^2]](https://tex.z-dn.net/?f=x%5E6%E2%80%93%2064y%5E3%3D%28x%5E2-4y%29%5Bx%5E4%2B4x%5E2y%2B16y%5E2%5D)
The remaining factors cannot be factored in anymore. Thus the completely factored form is:

<h2>They mark-up the price by <u>$13.20</u></h2><h3>The new price is $79.20 (If you need that information)</h3><h3><u /></h3><h3>66 x 0.20 = 13.20</h3><h3>The new price:</h3><h3>13.20 + 66 = 79.20</h3><h3 /><h3><em>Please let me know if I am wrong.</em></h3>