Question

if a+b=9 and ab=19, find value of a^2+b^2​

Answer 1

Here is the answer mate...

It is given that, a+b = 9 and ab = 19

We know that, a²+b² = (a+b)² - 2ab

→ (9)² - 2(19)

→ 81 - 38

→ 43

I hope this answer helps you..

If so..hit a thanks and mark as brainliest..and follow for more such brainly answers..

Whoever reads this.. have a great day..THANKYOU!!

Answer 2

Answer:

by putting the formula of (a+b)^2

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

by putting the values

a+b=9 and ab=19

we get

(9)^2=a^2+b^2×19

81=a^2+b^2+38

81 -38=a^2+b^2

therefore a^2+b^2=43