Question

if a+b+c=5,ab+bc+ca=10 then prove that
${a}^{3} + {b}^{3} + {c}^{3 } = - 25$
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Answer 1

Answer:

Step-by-step explanation:

a+b+c=5and ab+bc+ca=10

a^3+b^3+c^3=(a+b+c)^3-3(a+b+c)(ab+bc+ca)=125-150=-25