Maths 3題,,緊急的

1. Let f(x)=2x^2+kx-5. When f(x)is divided by x+2 or x-3, its gives the same remainder.

(a) Find the value of K

(b) Find the remainder when f(x) is divided by x+2

2. Let f(x)=8x^3+kx^2-2x+7. When f(x) is divided by 2x-1 or x-2, it gives the same remainder

(a)Find the value of K

(b) Find the remainder when f(x) id divided by 2x+1

3. Find the values of m and n if 2x^3+mx^2+4x+n is divisible by (x-1)(x+3)