Question

(x+2).(x-3). x(x+4)
5(x+4) x+2

Answer 1

(x + 2 ) (x - 3 ) x(x + 4 ) = (x² - 3 x + 2 x - 6 ). x(x + 4 ) =(x² - x - 6 .) (x² + 4 x) =
x^4 - x³ - 6 x² + 4 x³ - 4 x² - 24 x = x^4 + 3 x³ - 10 x² - 24 x

5 (x + 4 ) x + 2 = 
(5 x + 20) (x + 2) = 5 x² + 20 x  + 10 x + 40 = 5 x² + 30 x + 40