If a+b=7 and ab = 12, then find the value of a2 - ab + b2 .
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Answered by
6
squaring,
a2+b2+2ab=49
putting ab=12
we get,
a2+b2=49-24=25
now,
a2 - ab + b2=25-12=13
a2+b2+2ab=49
putting ab=12
we get,
a2+b2=49-24=25
now,
a2 - ab + b2=25-12=13
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0
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