Question

(x^2+4x+2)-(5x^2-5x+6)

Answer 1

terms raised to the same power can be added/subracted

Answer 2

(x3 + 3x2 + 5x – 4) – (3x3 – 8x2 – 5x + 6)
= (x3 + 3x2 + 5x – 4) – 1(3x3 – 8x2 – 5x + 6)
= (x3 + 3x2 + 5x – 4) – 1(3x3) – 1 (–8x2) – 1(–5x) – 1(6)
= x3 + 3x2 + 5x – 4 – 3x3 + 8x2 + 5x – 6
= x3 – 3x3 + 3x2 + 8x2 + 5x + 5x – 4 – 6
= –2x3 + 11x2 + 10x –10

Answer 3

that is a different question