Question

if a =-1,b= -2, c= -1,show that 7a+b+c=2abc
Fast picture also provided.

Answer 1

Refer to the picture above

Answer 2

7a + b + c = 2abc, proved.

Step-by-step explanation:

Here, a = 1, b = -2 and c = -1

Show that, 7a + b + c = 2abc

L.H.S.= 7a + b + c

= 7(1) + ( - 2) + (- 1)

= 7 - 2 - 1

= 4

R.H.S.= 2abc

= 2 × (1) × (- 2) × (- 1)

= 2 × 2

= 4

∴ L.H.S.= R.H.S. = 4, proved.

Hence, 7a + b + c = 2abc, proved.