Question

Find the product :
(a) (x + 4)(x - 5)
(c) (12x + 5y) (1 - x)
(e) (10x + 10b) (11x + 116)​

Answer 1

Step-by-step explanation:

(a) x^2-5x+4x-20

x^2-x-20=0

x^2-x(5-4)-20=0

x^2-5x+4x-20=0

x(x-5)+4(x-5)=0

(x-5) (x+4)=0

x-5=0. x+4=0

x=5. x=-4

(b)12x-12x^2+5y-5xy

-12x^2+12x+5y-5xy

12x^2-12x-5y+5xy ans.

(c)