Question

what is the value of ab+bc+ca-a²-b²+c², if a=2, b=3 and c=(-3) ?​

Answer 1

Answer:

ANSWER

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

Step-by-step explanation:

• 2*3 + 3*(-3) + (-3)*2 - 2*2 - 3*2

• 6 + 3*(-3) + (-3)*2 - 2*2 -3*2

• 9*(-3) +(-3)*2 - 2*2 - 3*2

• 27 + (-3) * 2 - 2*2 -3*2

• -24*2 - 2*2 - 3*2

• -48 - 4 - 6

• -38 :- This is your answer...

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