Question

When a number is added to its square it becomes 90. Find the number.

a. 8
b. 10
c. 7
d. 9​

Answer 1

Step-by-step explanation:

option d is correct see the photo for explanation

Answer 2

Answer:

The answer is 9(d).

Step-by-step explanation:

x+x²=90

x²+x-90=0

(x+10)(x-9)=0

x+10=0

x=-10 ans.

x-9=0

x=9 ans.