if a + b = 8 and ab = 7, then find a - b and ab
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1
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Answered by
1
Answer:
a-b= -6
Step-by-step explanation:
ab=7 and a+b=8
a= b/7
put the value of a
b/7+b=8
(b+7b)/7=8
8b=7×8
b=7
put the value of b
7+a=8
a=1
Now, a-b=1-7
= -6
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