Question

Hallar “x'' (x + 5)(x - 3) = x2 + x + 1

Answer 1

(X + 5)(X -3)

X² +5X - 3X -15

X² +2X - 15

Por el dato:

(X + 5)(X -3) = X² + X +1

Igualando:

X² +2X - 15 = X² + X +1

2x -15 = X + 1

2X -X = 1 + 15

X = 16

RESPUESTA: 16