Explanation:
Q Nine divided by the product of a number and Five
Let the number = x
product of a number and Five = x * 5 = 5x
The expression is given as;
![(9)/(5x)](https://img.qammunity.org/2022/formulas/mathematics/high-school/cdlib41w8jq64v7mfo9wph97j7edy7j41b.png)
Q2 The product of a sum and difference of x and y
Sum of x and y = x + y
Difference of x and y = x - y
The expression is given as;
(x + y) * ( x -y)
x^2 + xy - xy - y^2
x^2 - y^2