hinaharoon194 hinaharoon194
  • 01-12-2020
  • Mathematics
contestada

The sum of a whole number and twice the square of the number is 10. Find the number

Respuesta :

rherron20
rherron20 rherron20
  • 01-12-2020

Answer:

Hey there !

Solution:

Let the number be x

=> x + 2x² = 10

=> 2x² + x - 10 = 0

Factorising the quadratic equation we get,

=> 2x² + 5x - 4x - 10 = 0

=> x ( 2x + 5 ) -2 ( 2x + 5 ) = 0

=> ( x - 2 ) ( 2x + 5 ) = 0

=> x = 2, -5/2

Since x is a whole number, -5 / 2 wont be applicable.

Hence x = 2.

Hence the number is 2.

Hope my answer helped !

Step-by-step explanation:

Answer Link

Otras preguntas

Each screen in an impress presentation is called a _____ A. Page B. Transition C. Layout D. Slide
Cellular respiration converts the reactants' oxygen and glucose into carbon dioxide, water, and energy. The reverse reaction of photosynthesis converts reactant
Find the symmetries Y^2+4=x
Which excerpt from "The Cask of Amontillado" best illustrates the sarcastic tone of the narrator? 1"Come," I said, with decision, "we will go back; your healt
WILL MARK BRAINLIEST!!!! Ralph is the first to bring up the importance of keeping a fire lit on the island. Which best explains the symbolism of the fire? the
Which country joined Poland to form a powerful federation?
___ calor todo el verano. hacian haga hacia hago
math question below for question
If the rectangle perimeter equals 42 meters what is the length?
Define the terms solute, solvent, and solubility. Describe two factors that influence solubility.