Question

ifA=4x^3+3x-19,B=x^3+8x^2-7x+13andC=-5x^3-6x+20,find. (question) A-B-C​

Answer 1

Answer:

$a = 4 {x}^{3} + 3x - 19 \\ b = {x}^{3} + 8 {x}^{2} - 7x \\ c = - 5 {x}^{3} - 6x + 20 \\ a - b - c = 4 {x}^{3} + {x}^{3} - 5 {x}^{3} + 8 {x}^{2} + 3x - 6x - 7x + 19 + 20 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 0 {x}^{3} - 8 {x}^{2} - 10 {x} + 39$