Question

Find the square of the expression with the help of the formula
1. 2x +3y -z
2.107

Answer 1

Answer:

4x^2 + 9y^2 + z^2 - 12xy - 6yz + 4zx

Step-by-step explanation:

We know that, (a+b+c)^2

=a^2 + b^2 + c^2 +2ab +2bc + 2ac.

Substituting 'a' for "2x", 'b' for "-3y", and 'c' for "z" , you'll get the required answer.

ANSWER OF 2:-

                          by using (a+b)^2

                         (100+7)^2

                      =  100^2+7^2+2×100×7

                      = 10000+49+1400

                      =   11449