Question

Factories: (a+b) (c+d) - a² + b²​

Answer 1

Answer:

(a+b)(c+d) - a² + b²

ac + ad + bc + bd - a² + b²

ac + bc + ad + bd - a² + b²

c(a+b) + d(a+b) + b² - a²

c(a+b) + d(a+b) - (b+a)(b-a)

(a+b)(c + d -(b - a)

(a + b)(c + d + a - b)

(a + b)(a - b + c + d)