Question

When a number is substracted from its square the
result is 20. What is the number ?​

Answer 1

Answer: -4 or 5

Step-by-step explanation:by shri daracharaya rule solve the quadratic eqn

Answer 2

Answer:

ok,

Let the two numbers be x and x²

According to conditions

x² - x = 20

x² - x - 20 = 0

x² + 5x - 4x - 20 = 0

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

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

x + 5= 0 or x - 4 = 0

(x = -5 or x = 4)

Rejecting the negative value.

x = 4

x² = 4 × 4 = 16