si el doble de un número se le aumenta su cuadrado se obtiene una cantidad que es menor que 15 ¿entre qué valores se encuentra dicho número?

Respuesta:

x=]-5,3[

Explicación:

Inecuación: 2x+x²<15

Pasamos el 15 (pasando con el símbolo contrario):

2x+x²-15<0

Ordenamos:

x²+2x-15<0

Factorizamos/Aspa simple:

x²+2x-15<0

x        +5

x         -3

(x+5) (x-3)

Igualamos a 0:

x+5=0               x-3=0

x= -5                 x=3

Respuesta final:

x=]-5,3[

(con corchete abierto ya que el símbolo es "<")

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

answer: input the dimensions of the room to be painted. click the button to calculate the amount of paint and man-hours needed for this job.

interior paint coverage depends on the brand of paint used. the coverage amount is listed on the label of the paint can. use this to adjust the values in the paint coverage section below. paint usually is applied at 350 to 400 square feet per gallon (primer at 200 to 300 square feet per gallon).

step-by-step explanation: