If a+b=9, a ob = 18, find a-b
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Answer:
3
Step-by-step explanation:
a+b=9
ab=18
a-b= ??
(a-b)whole square=(a+b) whole square -4ab
". = 81-4.18
". = 81- 72
". = 9
(a+b). = 3
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