a+b=7 and ab = 12 find the value of a2 + b2 _ab
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heya,
a+b=7_____1)
ab=12 _____2)
so ,( a-b)^2=(a+b)^2-4ab
______(a-b)^2=49-48
a-b=+-1
if a-b=1 ___3
a+b=7
a-b=+1
_____
2a=8
a=4
now,in (1)
b=-3
and,if ____a+b=-1____4)
then a+b=4
___a-b=-1
________2a=3
a=3/2
and
b=5/2ans
hope it help you .
@rajukumar☺
a+b=7_____1)
ab=12 _____2)
so ,( a-b)^2=(a+b)^2-4ab
______(a-b)^2=49-48
a-b=+-1
if a-b=1 ___3
a+b=7
a-b=+1
_____
2a=8
a=4
now,in (1)
b=-3
and,if ____a+b=-1____4)
then a+b=4
___a-b=-1
________2a=3
a=3/2
and
b=5/2ans
hope it help you .
@rajukumar☺
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