Which shows a perfect square trinomial?
group of answer choices

latex: 49x^2-70xy+10y^2 49 x 2 − 70 x y + 10 y 2

latex: 50y^2-4x^2 50 y 2 − 4 x 2

latex: 16x^2+24xy+9y^2 16 x 2 + 24 x y + 9 y 2

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

f is the midpoint of