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22 votes
22 votes
4. Complete the following explanation to show that the sum of two rational numbers a

rational number.
Let a,b,c and d be integers. Let x and y be rational numbers. Consider the following
expression:
* = and y =
The above expressions represent the
If x + y = y + x
represents the
then, we can use the
to show that x +y = 3+. Using the rule for addition of
fractions to write an equivalent expression for x + y = 4+we obtain
The product of two integers results in an integer, so bd, ad and cb are all integers. Also.
since the sum of two integers results in an integer, ad + cb is an integer. Therefore,
xty is

User Cfx
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1 Answer

15 votes
15 votes
Y +x=45 using integrated experience x +x = y
User Khan
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