if a + b = 8 and ab = 7, then find a - b and a and b
Answers
Answered by
0
Answer:
a=1 and b=7
a-b= -6
Step-by-step explanation:
a+b=8
ab=7
a=7/b
put the value of a
7/b+b=8
8b/7=8
8b=7×8
b=7
put the value of b
a+b=8
7+a=8
a=1
So,a-b=1-7
= -6
Answered by
0
Answer:
a-b=6
a=7
b=1
Step-by-step explanation:
(a+b)^2 -4ab =(a-b)^2
therefore,
(8×8)-(4×7)=(a-b)^2
64-28=(a-b)^2
36=(a-b)^2
6=a-b
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