1.

If a +b+c=9 and ab+bc+ca=19Find a^2+b^2+c+2.​

Answer»

Answer:

43

Step-by-step EXPLANATION:

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

81=a^2+b^2+c^2+2*19

a^2+b^2+c^2=81-38

= 43



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