Question

Using suitable identity evaluate 212

-112​

Answer 1

Answer:

2604

Step-by-step explanation:

212-112

= (200+2) (100+2)

= (2+200) (2+100)

= (2)² + (200+100)2 + (200×100)

= 4 + (300)2 + 2000

=4 + 600 +2000

=2604

identity used: (x+a) (x+b) = x² + (a+b)x + ab

Answer 2

Step-by-step explanation:

x plus a x plus b is equal to x squareplus b plus b x plus ab