Question

find (a+b+c) (a+b-c) ​

Answer 1

Answer:

-2 q

Step-by-step explanation:

We know that

(a+b+c)

2

=a

2

+b

2

+c

2

+2(ab+bc+ca)

Given ab+bc+ca=q

a+b+c=p

=>p

2

=a

2

+b

2

+c

2

+2(q)

=>a

2

+b

2

+c

2

=p

2

−2q

Answer 2

Answer:

(a+b+c) (a+b-c)

a^2+b^2-c^2+2ab. ans.