Question

subtract the first polynomial from the second asquare - 5a +6; acube - 4asquare +5 -a​

Answer 1

I think you want to say

${a}^{2} - 5a + 6 \: \\ {a}^{3} - 4 {a}^{2} + 5 - a$

so here,

${a}^{3} - 4 {a}^{2} - a \: + 5 \\ - {a}^{2} + 5a - 6 \\ \\ = {a}^{3} - 5 {a}^{2} + 4a - 1$

it's in short of you want in longer way then repost the question I will answer .

(sorry if you find it wrong)