If a-b= 10, ab = 11, find the value of a + b.
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Answer:
12
Step-by-step explanation:
(a-b)²=10²
a²+b²-2ab=100
a²+b²=100+2ab
a²+b²=100+22
a²+b²=122
(a+b)²=a²+b²+2ab
=122+22
=144
a+b=√144
=12
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