Use formula for difference of perfect cubes:
![a^3-b^3=(a-b)(a^2+ab+b^2).](https://tex.z-dn.net/?f=a%5E3-b%5E3%3D%28a-b%29%28a%5E2%2Bab%2Bb%5E2%29.)
Consider expression
You know that
then
![x^3-1331=x^3-11^3=(x-11)(x^2+11x+121).](https://tex.z-dn.net/?f=x%5E3-1331%3Dx%5E3-11%5E3%3D%28x-11%29%28x%5E2%2B11x%2B121%29.)
The quadratic trinomial
cannot be factored anymore, so the expression
has two factors
and ![x^2+11x+121.](https://tex.z-dn.net/?f=x%5E2%2B11x%2B121.)
Answer: correct choice is A.
Here's how you solve this problem.
1) find how many kilometers equals 1 mile (16/10=1.6).
2) Divide 100 (from 100 km/h) by 1.6 (1.6×100=62.5).
3) solve for mph.
The answer is 62.5mph.
A^-4. 1/ a number with an exponent is almost always the number to the negative exponent.
Answer:
The error was they used the wrong inequality sign.
At most means: ≤
So, the correct equation is; 2x≤−24.
Answer:
f = h/dg
Step-by-step explanation:
Step 1: Write out equation
dgf = h
Step 2: Rearrange
fdg = h
Step 3: Divide both sides by dg
f = h/dg