Question

find the value of a-b when a+b=9and ab = 20​

Answer 1

Answer:

1

Step-by-step explanation:

(a-b)^2=(a+b)^2-4ab

=81-80

=1

Thus,a-b=1.

ALL THE BEST DEAR!!!!!

Answer 2

Answer:

(1)

Step-by-step explanation:

$a + b = 9 \: \: \\ ab = 20 \\then \: \: \: a - b \\ = {(a + b)}^{2} - 4ab \\ = {9}^{2} - 4 \times 20 \\ = 81 - 80 \\ = 1$

hope this helps u