What is the difference of squares, and how does if factor?

Correct  (a - b) · (a + b) = a² - b²

Step-by-step explanation:

The difference of square we get when we multiply the next two binomials

and applying distributive and commutative law:

(a - b) · (a + b) = a² - ba + ab - b² = a² - ab + ab - b² = a² - b²

God is with you!!!

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b