Use grouping symbols to make the following equation true.
5 x 4 = 3²-4=4

(5 x 4)= (3^2 - 4)= 4

Step-by-step explanation:

(5 x 4)=20,

(3^2 -4)= (9-4)

(20)=(5)=4

20/5=4

4=4

its the fourth option

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