Question

if a=5,b=6 and c=10 find the value of

1.a+b/c-a​

Answer 1

ANSWER

(A)

ab+bc+ca−a

2

−b

2

−c

2

(a+b+c)(a

2

+b

2

+c

2

−ab−bc−ca)

=

−[a

2

+b

2

+c

2

−ab−bc−ca]

(a+b+c)(a

2

+b

2

+c

2

−ab−bc−ca)

=−[a+b+c]

=−[−5−6+10]

=−[−1]=1