Question

if a+b+c=9,ab+bc+ca=26then the value of (2a) +(2b) +(2c) -20=?​

Answer 1

Answer:

-2

Step-by-step explanation:

a+b+c=9

2a+2b+2c-20=

2(a+b+c-10)=

2(9-10)

=2*(-1)

=-2

Answer 2

Answer:

10/9

Step-by-step explanation:

2a+2b+2c=20

2(a+b+c)=20

a+b+c=10

9=10

=10/9