Question

AYUDAAAAAA URGENTEEEE POR FAVORRRRR LO NECESITO CON RESOLUCIÓN
DOY CORONITA

Answer 1

Respuesta:

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