Question

If a + b =2 ab=4 then (a-b)2

Answer 1

Answer:

-12

Step-by-step explanation:

given a+b =2

ab= 4

then find (a-b)^2

firstly we have to find (a+b)^2=a^2+b^2+2ab

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

a^2+b^2 = -4

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

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

= -4-8

= -12

(a-b)^2= -12