Question

(689) ^2 using formula a^2-2ab+b^2​

Answer 1

Answer:

=(689)^2=(690-1)^2

=a^2-2ab+b^2

=(690)^2-2(690)(1)+(1)^2

=476100-1380+1

=474721

Answer 2

Answer:

HEY DUDE , U R ANSWER

Step-by-step explanation:=(689)^2=(690-1)^2

=a^2-2ab+b^2

=(690)^2-2(690)(1)+(1)^2

=476100-1380+1

=474721