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CUET
General Test
Quantitative Reasoning
Algebra
If a + b = 10 and ab = 9, then the value of a - b is:
7
5
8
6
If a + b = 10
ab = 9,
Then the value of a - b
If x + y = n
then, x - y = √n2−4xy
a - b = √102−4×9 = 8