Question

Solve a+b=4, ab=5 find a²+b²

Answer 1

Squaring on both sides
So
(A+b)²=4²
A²+b²+2*5=16
A²+b²=16-10
A²+b²=6





I hope this will help u

Answer 2

(a + b) = 4 

Square on both sides,

(a + b)² = 4²

a² + b² + 2ab = 16

a² + b² + 2(5) = 16 

a + b² + 10 = 16 

a² + b² = 16 - 10 

a² + b² = 6 




i hope this will help you


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