Question

2 square – 11x – 21 =0

Answer 1

Answer:

4 - 11x - 21 = 0

-11x = - 4 +21

-11x = 17

X = - 17/11

Hope it's helpful to you.

According to my point of view this is the correct answer.

Answer 2

Answer:

2 square - 11 - 21 = 0

(2×2) - 11 - 21 = 0

4 - 32 = 0

28 = 0

28 not is not equal to 0 so that equation is wrong