Question

When the polynomial p(x) = x³+x²-5kx - 7 and q(x)= x³ + kx²-12x+6 are divided by
(x+1) and (x-2) leaving the remainder a and b respectively. Find the value of k when 2a-b=10​

Answer 1

A in the attachment is basically K

$\huge\mathbb{\purple{ドラえもんバツ のび太}}$