Question

Find the value of a² + b² , when a+ b = 8 and ab = 12

Answer 1

Answer:

Step-by-step explanation:

6+2=8

6*2=12

$6^{2}$ +$2^{2}$= 36+4=40

Answer 2

Answer:

Here,

a2 +b2=(a+b)

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

$(8) {}^{2} - 2 \times 12$

$64 - 2 \times 12$

$40$

Step-by-step explanation:

So,

Therefore,

$a {}^{2} + b {}^{2} = 40$

I'm not sure if this is correct or not, but this the way I learned..