Question

if a^2+b^2=49 and ab=20 find the value if a-b​

Answer 1

Answer:

+-3

Brainliest? Do mark.

Step-by-step explanation:

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

= 49-2×20

= 49-40

=9

Therefore, a-b= square root +-9

=+-3

Answer 2

Hi this is your answer
a^2+b^2=49
ab=20
a^2+b^2+ab=49+20
a^2+b^2+ab=69
Using Identity
a^2+b^2+ab=(a-b)
(a-b)=69