Practice problem
Let f(x)=2x2+4x+12f(x)= 2x^2+4x+12f(x)=2x2+4x+12. What is f(cx)f(cx)f(cx) if c=12c=\dfrac{1}{2}c=21?
18x2+2x+12\dfrac{1}{8} x^2+2x+1281x2+2x+12
12x2+2x+12\dfrac{1}{2} x^2+2x+1221x2+2x+12
14x2+2x+12\dfrac{1}{4} x^2+2x+1241x2+2x+12
12x2+8x+12\dfrac{1}{2} x^2+8x+1221x2+8x+12
Type a concept, like “slope” or “photosynthesis”.
