Question

F(x) = -7x3 + 6 and g(x) = -2x4 + 10, find (f - g)(-5).

Answer 1

f(x) = -7x³ + 6

g(x) = -2x⁴ + 10

(f - g)(x) = -7x³ + 6 + 2x⁴ - 10

= 2x⁴ - 7x³ - 4

(f - g)(-5) = 2(-5)⁴- 7(-5)³- 4

= 1250 + 875 - 4

= 2121

Hope this helps.