Question

Factorise 2(ab+cd)-a^2-b^2+c^2+d^2​

Answer 1

Answer:

Step-by-step explanation:a² +b² -c² -d² +2ab -2cd

=> a²+b²+2ab -c²-d²-2cd

=> (a+b)² -1[c²+d²+2cd]

=> (a+b) ² -1(c+d)²

=> (a+b)² - (c+d)²

=> {(a+b) -(c+d)} {(a+b) + (c+d)}

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

I hope this will help you