If a +b+c=6 and ab + bc+ca=15, then a^2 + b^2 + c^2=
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Answer:
the answer is
Step-by-step explanation:
ac+ = b +=a^3
Answered by
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Answer:
a+b+c = 6
squaring both the sides
(a+b+c)^2 = (6)^2
(a+b+c)^2 = a^2+b^2+c^2+2ab+2bc+2ca
a^2+b^2+c^2+2ab+2bc+2ca = 36
a^2+b^2+c^2+2(ab+bc+ca) = 36
a^2+b^2+c^2+2×15 = 36
a^2+b^2+c^2+30 = 36
a^2+b^2+c^2 = 36-30
a^2+b^2+c^2 = 6
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