Question

What is the value of a2-ab+b2 ?

Answer 1

Given,

⇒a+b=10

⇒ab=16

⇒(a+b)

2

=a

2

+b

2

+2ab

⇒10

2

=a

2

+b

2

+2(16)

∴a

2

+b

2

=68

⇒a

2

+b

2

+ab=68+16=84

⇒a

2

+b

2

−ab=68−16=52