Question

When 63x3y + 105x2y is divided by -7xy, the quotient is . If this quotient is divided by , the result is 3x + 5.

Answer 1

Answer:

   -9x^2 - 15x.

   -3x.

Step-by-step explanation:

The first quotient is -9x^2 - 15x.

To find the second result we divide the above  by 3x + 5:

          -3x

          ____________

3x + 5) -9x^2 - 15x

           -9x^2 - 15x

           -----------------

            ..................

The result is -3x.

Answer 2

Answer:

The answers are -9x²-15x and -3x

Step-by-step explanation:

First we need to find  $\frac{63x^3y + 105x^2y}{-7xy}$.

  $\frac{63x^3y + 105x^2y}{-7xy}=\frac{63x^3y}{-7xy}+\frac{105x^2y}{-7xy}=-9x^2-15x$

Now we need to find value of z for which $\frac{-9x^2-15x}{z}=3x+5$

                 $\frac{-9x^2-15x}{z}=3x+5\\\\z=\frac{-9x^2-15x}{3x+5}=\frac{-3x(3x+5)}{3x+5}=-3x$      

So the answers are -9x²-15x and -3x