Question

Write down at least five number

pairs to solve the equation

(r – 2)(s +1) = 0.

Answer 1

`(r,s) => (2,-1);(2,0); (1,-1); (4,-1);(2,3)`

Explanation:

Given

`(r - 2)(s +1) = 0`

Required

Write at least 5 pair of numbers

`(r - 2)(s +1) = 0`

This can be split to be

`r -2 = 0` --- (1)

or

`s + 1 = 0` --- (2)

Solve for r in (1)

`r = 2`

This means that for whatever value that s assumes, the equation will always be true when r = 2

Solve for s in (2)

`s = -1`

This means that for whatever value that r assumes, the equation will always be true when s = -1

So, we can make use of the following pair

`(r,s) => (2,-1);(2,0); (1,-1); (4,-1);(2,3)`