Choose one of the factors of x^3 + 343.
answer
a. none of the above
b. x^2 + 7x + 49
c. x – 7
d. x^2 – 14x + 49

First, note that Then use the formula for the sum of perfect cubes:

Therefore,

The quadratic trinomial couldn't be factored anymore, so the expression has two factors and

correct choice is A.

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1