If you are asking (a-b) square then read this -
If you want to know the answer then you have to do like this-
a(a-b)-b(a-b) ,
a square - ab -ba+b square ,
a square - (ab+ba) +b square,
a squre-2ab+b square - Ans
An example for you-
Q. (3x-2y)square
Ans. 3x(3x-2y)-2y(3x-2y),
9x sqaure -6xy-6yx+4y square,
9x square - (6+6)xy + 4y square,
9x square - 12xy+4y square - Ans
One more example for you -
Q. (x - z )square
Ans. x (x - z )-z (x -z )
x square - xz -zx + z square
x square - (xz+zx) + z square
x square - 2xz + z square -Ans.
Thumbs UP