Your friends cheer and congratulate you as the lights flicker back on once you have closed the electrical circuit! You gaze around Scoops Ahoy and you discover that there is a piece of paper sticking out from under the counter. You lightly tug on the end of the piece of paper and a stack of folders falls to the floor. You kneel down and look closely at the manila folder. There is a strange sequence that reads "x^2+3x-4 and x=63 will gain you entrance." Solve the code!

4154

Step-by-step explanation:

Given the expression:

and x=63

We simply substitute x=63 into the expression to obtain the code.

When x=63

The code is 4154.

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