What number must you add to complete the square? x^2+10=29

To find the answer subtract 10 from both sides. x^2 = 19
Take the square root of both sides to get x = the square root of 19

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

Iam not good at math i wish i could