Question

if a+b=12 and ab=35 ,then (a-b)^2=​

Answer 1

Answer:

(a-b)²=a²+b²+2ab

=[a²+b²]+2(35)

=[(a+b)²-2ab]+70

=[(12)²-70]+70

=144+0

=144

(a-b)²=144

(a-b)=12

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