Question

Find the value using identities : (4.9)^2 + (1.2)^2 - 2 *1.2 * 4.9/4.9 -1.2

Answer 1

Answer:

The given is of the form

a^2+b^2-2ab=(a+b)^2 so 4.9^2+1.2^2-2*1.2*4.9=(4.9-1.2)^2 so replacing we get

=(4.9-1.2)^2÷(4.9-1.2)

=so one gets cancelled on the square so

Ans=4.9-1.2=3.7.

Thus Answer is 3.7