Question

if a+b=6 and ab=3 then a2+b² is​

Answer 1

Answer:

answer 30

Step-by-step explanation:

(a+b)2=a2+2ab+b2=a2+b2+2ab

Now lets plug 6 to replace (a+b) and 3 to replace ab. We have,

62=a2+b2+2(3)

a2+b2+6=36

a2+b2=36-6

a2+b2=30

Answer 2

Answer:

a2+b2=30

Step-by-step explanation:

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

therefore,a2+b2=(a+b)2-2ab

=(6)^2-2(3) =30