Question

If a+b=7, ab=12 a^2+b^2​

Answer 1

Step-by-step explanation:

a^2+b^2=(a+b)^2-2ab

=7^2-24

=49-24

=25

Answer 2

Answer:

13

Step-by-step explanation:

A + b =

7ab

$= 12a^2 - ab + b^2$

$= a^2 + b^2 + 2ab - 3ab$

$= (a + b)^2 - 3ab$

$= (7)^2 - 3 x 12$

= 49 - 36

= 13