Question

Plzzz solv it fast. no vi

Answer 1

2(ab + cd) - a² - b² + c² + d²
2ab + 2cd -a² - b² + c² + d²
(c²+d²+2cd) + (-a²-b²+2ab)
(c+d)² - (a²+b²-2ab)
(c+d)² - (a-b)²
(c+d+a-b)(c+d-a+b)

Answer 2

2( ab+ cd) -a² - b² + c² + d²

=c² +2cd + d² -{ a² -2ab + b²}

=(c + d)² -( a -b)²

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