Question

Suppose you have:
u = 2f + 14
f = 4x - 4x²
What is u in terms of x?

Answer 1

put the whole thing after f = in the first equation

so

x^2 means x squared

so

u = 2 (4x - 4x^2) + 14

so

u = 8x - 8x^2 + 14