If a+b=8,a^2+b^2=40,then (a-b)
^2 is
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Step-by-step explanation:
(a-b)²=a²+b²-2ab.................1
(a+b)²=8²
a²+b²+2ab=64
40+2ab=64
2ab=24
ab=12
by equation 1
40-24
16 is the answer
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