Question

find the value of a3 + b2 +c3-3abc 1 Find the value of ab + bc +ca-a? - b? - when a = 7.b=4. c = -10 2 а -​

Answer 1

Answer:

∣

∣

∣

∣

∣

∣

∣

∣

a−b

b−a

c−a

b+c

c+a

a+b

a

b

c

∣

∣

∣

∣

∣

∣

∣

∣

C

1

→C

3

−C

1

∣

∣

∣

∣

∣

∣

∣

∣

b

a

a

b+c

c+a

a+b

a

b

c

∣

∣

∣

∣

∣

∣

∣

∣

C

2

→C

2

−C

1

∣

∣

∣

∣

∣

∣

∣

∣

b

a

a

c

c

b

a

b

c

∣

∣

∣

∣

∣

∣

∣

∣

Determinant ⇒b(c

2

−b

2

)−c(ac−ab)+a(ab−ac)

=bc

2

−b

3

−c

2

a+abc+a

2

b−a

2

c