Question

Using suitable identity find the value of:

a) 982

b) 1072​

Answer 1

Answer:

a) 9604

b) 11449

Step-by-step explanation:

a) 98²=(100-2)²=100²-2(100)(2)+2² [using (a-b)²]

=10000-400+4

=9,604

b) 107²=(100+7)²=100²+2(100)(7)+7² [using (a+b)²]

=10000+1400+49

=11,449