Question

(10) ² +(20) ² (solve the above using identity) ​

Answer 1

Answer:

Step-by-step explanation :

Since (a+b)^2=a^2+b^2+2ab

So a^2+b^2= (a+b)^2-2ab

Here (10)^2+(20)^2=(10+20)^2-2*10*20

=30^2-400

=900-400

=500