Question

Evaluate by using identify 51 square - 49 square

Answer 1

Answer:

Here is the answer

51²=

(50+1)²= By using the formula a²+b²+2xaxb

= (50)²+(1)²+2x50x1

=2500+1+100

=2601

(49)²=

(40+9)²= (40)²+(9²)+2x40x9

= 1600+81+720

=2401

(51)²-(49)²

= 2601 - 2401

=200

200 is the answer to the question