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Question

Match the numbers in the first column with their respective conjugate pairs.

A
7
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B
9
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C
2
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Solution

The conjugate has the same numbers but the opposite sign in the middle.

The rationalizing factor of 2 is its conjugate pair 2.
Because while multiplying 2 with its conjugate pair 2 will result in rational number -2
2×2=2× 2=(2)2=2

The rationalizing factor of 7 is its conjugate pair 7.
Because while multiplying 7 with its conjugate pair 7 will result in rational number -7
7×7=7× 7=(7)2=7

The rationalizing factor of 9 is its conjugate pair 9.
Because while multiplying 9 with its conjugate pair 9 will result in rational number -9
9×9=9× 9=(9)2=9

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