Question

4. If f(x) = 2x + 4y and g(x) = 2x2 -3x + 6y, find g(x) – f(x)

A. 2x2 – x +10y
B. 2x2 -5x +2y
C. 2x2 +5x +10y
D. 2x-x + 2y

Answer 1

9514 1404 393

Answer:

B. 2x^2 -5x +2y

Explanation:

Substitute the given expressions and collect terms.

g(x) -f(x)

= (2x^2 -3x +6y) -(2x +4y)

= 2x^2 -3x +6y -2x -4y

= 2x^2 -5x +2y . . . . . . . . . . matches choice B