2 &
9
Which expression is equivalent to (3a + 7)(2a - 5)?
O A. 5a2 - a - 35
B. 5a2 - 29a - 35
OC. 642 - a - 35
O
D. 6a2 - 29a - 35

C

Step-by-step explanation:

6a²-15a+14a-35=6a²-a-35

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