Question

hallar el valor de e

Answer 1

${(a + b + c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2(ab + bc + ac)$

${0}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2(ab + bc + ac)$

${a}^{2} + {b}^{2} + {c}^{2} = - 2(ab + bc + ac)$

Reemplazamos en E:

E= -2(ab+bc+ac)/ ab+bc+ac

E= -2.