Question

If 21² = 400+40+k , then find the value of K .

Answer 1

Answer:

1

Step-by-step explanation:

21² = 400 + 40 + k

= 441 = 440 + k

k = 441 - 440 = 1

∴ k = 1

Answer 2

Given
21^2 =400+40+K
441=440+K
440+K =441
K =441-440
K=1