Solve the following word problem by using an equation and factoring. The sum of a positive number and its square is 20. What is the number?

Anwsers: 1, 2 , 3 , 4 , 5

Question

Solve the following word problem by using an equation and factoring. The sum of a positive number and its square is 20. What is the number? 
  
Anwsers: 1, 2 , 3 , 4 , 5

anonymous · Answer

Well.. what seems to be the problem? :)

anonymous · Answer

i need the anwser..

anonymous · Answer

well what seems to be the answer? ;D

anonymous · Answer

I thought so... but.. why can't you figure it out yourself? Where are you stuck?

anonymous · Answer

I say is probably one of those in the delimited set of numbers that composed that group ;D

anonymous · Answer

x+x^2 = 20
x^2 + x - 20 = 0
Factor and solve the positive answer.

anonymous · Answer

$$\Large x+x^2=20 $$
$$\Large x^2+x-20=0 $$

anonymous · Answer

wait don't tell  me.... is a number who's has a pair of two primes, which is the lowest prime number there can be and is also a lowest pair number ;D

anonymous · Answer

is 4, ok?, just in case you be still wondering what number was it :p

dumbcow · Answer

its multiple choice so an easy trick is just try each possible answer , only 1 will work :)
of course its best to be able to know how to solve quadratric equations without given answer choices

anonymous · Answer

NVM..