Peta attempted to solve the following equation. explain peta's error.
x (x - 5) = 20
x = 20 and x - 5 = 20
x = 20 and x = 25

see explanation

Step-by-step explanation:

The error is in equating x(x - 5) = 20

and assuming x = 20 , x - 5 = 20

The correct approach is to rearrange the equation into standard form by subtracting 20 from both sides and equating to zero, that is

x(x - 5) - 20 = 0

x² - 5x - 20 = 0 ← in standard form

Then solve using the quadratic formula or completing the square

the answer is two. hope this !