Question

. The sum of a number and its square is
20. Find the number.​

Answer 1

Answer:

4,-5

Step-by-step explanation:

Let the number=x

x+x²=20

x²+x-20=0

x²+5x-4x-20=0

x(x+5)-4(x+5)=0

(x-4)(x+5)=0

x=4  or  x=-5

Answer 2

Answer:

the numbers are 4 and -5.