Respuesta :

Answer:

Step-by-step explanation:

X^2+7x+63=63

<=> x^2+7x=63-63=0

<=> X(x+7)=0

<=> x1=0

X2=-7

thwng

Answer:

0 or -7

Step-by-step explanation:

     x² + 7x + 63 = 63

⇔ x² + 7x + 63 - 63 = 0

⇔ x² + 7x = 0

⇔ x(x + 7) = 0

So either:  x = 0

            or x + 7 = 0 ⇔ x = -7

Otras preguntas