4x²y + 3y²z - 2xy² - 3x²y + 4y²z

=x2y−2xy2+7y2z

Step-by-step explanation:

Simplify

Let's simplify step-by-step.

4x2y+3y2z−2xy2−3x2y+4y2z

=4x2y+3y2z+−2xy2+−3x2y+4y2z

Combine Like Terms:

=4x2y+3y2z+−2xy2+−3x2y+4y2z

=(4x2y+−3x2y)+(−2xy2)+(3y2z+4y2z)

=x2y+−2xy2+7y2z

=x2y−2xy2+7y2z

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 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