Question

a+b+c=7 a^2+b^2+c^2=12 find ab+bc+ca​

Answer 1

Answer:

4874677474474637837363638393

Answer 2

Answer:

37/2

Step-by-step explanation:

(a+b+c)^2 = a^2+b^2+c^2+2(ab+bc+ca)

(7)^2=12+2(ab+bc+ca)

49=12+2(ab+bc+ca)

49-12=2(ab+bc+ca)

37=2(ab+bc+ca)

37/2 = ab+bc+ca