Question

if a+b-c=4 and a²+b²+c²=38 find ab-bc-ca​

Answer 1

Step-by-step explanation:

as.per this :

a²+b²+c²=38

a= 2

b=3

c=5

(2*3)-(3*5)-(5*2)

= 6-15-10

= -19