Which is a factor of the trinomial x² - 2x - 15?
A.) (x – 13)
B.) (x + 13)
C.) (x - 5)
D.) (x + 5)

(x-5)

Step-by-step explanation:

Factorizing x^2-2x-15:

=== x^2-5x+3x-15

  =  x(x-5)+3(x-5)

  =  (x+3)(x-5)

The factors of  x^2 - 2x - 15 are (x+3)(x-5)

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