Let f(x)=x+1 and g(x)= x^2 – 2. Find f (x)· g(x)

9514 1404 393

  f(x)·g(x) = x³ +x² -2x -2

Step-by-step explanation:

Substitute the function definitions and simplify.

  f(x)·g(x)

  = (x +1)(x² -2)

  = x(x² -2) +1(x² -2)

  = x³ -2x +x² -2

  f(x)·g(x) = x³ +x² -2x -2

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls