Question

if a+ b = 13 and ab = 17 then find the ( a square + b square)​

Answer 1

Step-by-step explanation:

(a+b)

2

=a

2

+b

2

+2ab

=>a

2

+b

2

=(a+b)

2

−2ab

Given, a+b=5 and ab=6

So, a

2

+b

2

=(a+b)

2

−2ab=5

2

−2×6=25−12=13

Answer 2

Step-by-step explanation:

Put the formula-

$a ^{2} + b^{2} = (a + b)^{2} - 2ab$

where , (a+b)= 13। and। ab=17

$a ^{2} + b^{2} = 13^{2} - 2 \times 17$

$a^{2} + b^{2} = 169 - 34$

$a^{2} + b^{2} = 135$

this is right answer