Question

4. If a + b = 5 and ab = 2, find the value of
(a) (a + b)
(b) a2 + b2
(c) (a - b)²



only 4 ka c
​

Answer 1

c)18

Step-by-step explanation:

if a+b=5 and ab=2

then

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

=25-4=21

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

=21-4=18

HOPE IT HELPS

Answer 2

Answer:

=a2+b2-2ab

=21-2(2)

=21-4

=17