Carmellajaneviz
Answered

a whole number increased by its square is two more than twice itself .find the the number

Sagot :

2x+2 = x 
2x+2 -2 = x-2 - Add the additive inverse of the number to both sides of the equation to move it to the other side of it 
2x= x-2 cancel 2-2 because it will be zero
2x-x = x-2-x - Add the additive inverse of the variable to both sides of the equation to move it to the other side of it 
x= -2