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A un número se le aumenta el triple de su cuadrado y resulta 154
↓ ↓ ↓ =
x + 3x² = 154
3x² +x=154
Igualamos a cero
3x²+x-154=0
Factorizando
(x-7)(3x+22)=0
x-7=0; 3x+22=0
x=7 ; x=-22/3
Solucion
x=7
x=-22/3
comprovacion
3x² +x=154
3(7)²+7=154
3(49)+7=154
147+7=154
154=154