If a-b = 3, ab =40,
find (a+b)
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Answered by
0
Answer:
a-b = 3
=> a= 8
=>b= 5
a+ b= 11
Answered by
2
Answer:
a-b=3 and ab=40
b= 40/a
put the value in 1 st equation
a-40/a=3
a^2-40=3a
a^2-3a-40
above equation is quadratic equation
hence
a^2-8a+5a-40
a( a-8)+5(a-8)
(a+5)(a-8)
a=-5 or 8
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