Answers

2015-07-13T18:06:11+05:30
1> 
(a+b)=3 , ab=2
We know: (a-b)²=(a+b)²-4ab
⇒(a-b)²=3²-4*2
⇒(a-b)=9-8=1
⇒(a-b)=√1=+1 or -1.
Ans:a-b=1 or -1.
2>
(a+b)=10 and (a-b)=6
⇒a=b+6
or ,(b+b+6)=10
or,2b=4 or, b=4/2=2.
⇒a-2=6
⇒a=6+2=8
⇒a²+b²=8²+2²
=64+4
=68
Ans:(a²+b²)=68.
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