Function

I don't see the question has any meaning. It cannot be solved.

When f(x) is divided by (x - 5)

f(x) = (x - 5)Q(x) + R1 = 3

R1 = 3

When f(x) is divided by (x + 4)

f(x) = (x + 4)P(x) + R2

There is no enough data to solve for R2

同學，資料不足，但仍可以教你分析一下：

When f(x) is divided by (x - 5), the remainder is 3.
即是 f(5) = 3

What is the remainder when f(x) is divided by (x + 4) ?
即是問 f(-4) = ?