1. If a + b = 6 and ab = 8, evaluate (i) a-b
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Answer:
2 or -2
Step-by-step explanation:
ab=8
a=8/b
8/b+b=6
8+b^2=6b
b^2-6b+8=0
(b-4)(b-2)=0
b=4 or b=2
therefore a=2 or a=4
a-b=2 or -2
see if it is correct
i m not sure
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