If a+b =7and ab=10find a-b
Answers
Answered by
0
Step-by-step explanation:
=(a+b)²=7²
=a²+b²+2ab=49
=a²+b²=49-2(10)
=a²+b²=29
Now
(a-b)²=a²+b²-2qb
=29 -20(10)
=29-20
=9
therefore
a-b =√9
=3
Similar questions