Question

if a and b are the roots of equation x²-5x+6,find
I)a²+b² pls give ans ​

Answer 1

Answer:

Correct option is

B

±5

Given equation is: x

2

−5x+6=0

Here, a+b=5;ab=6

a

2

−b

2

=(a+b)(a−b)

=(a+b)

(a+b)

2

−4ab

=5.

5

2

−4×6

=5.(±1)=±5