Question

ok i am extremely confused i thought if you multiply fractions u multiply the denominator as well but in this problem of "completing the square" the denominator stays the same....
x^2-17x+72=0

Answer 1

solve for x factorize it

Answer 2

why is it 289/4 shouldnt it be 289/16

Answer 3

what do you mean? can you show the part where the multiplication of fractions is not followed?

Answer 4

x^2-17x____=-72
1/2(-17)

Answer 5

wait so when multiplying that it would be -17/2?

Answer 6

you'd be multiplying -17/2 by -17/2

Answer 7

then add that to both sides :)

Answer 8

ahhhh i see no wonder its 289/4

Answer 9

thank you beautiful

Answer 10

you're welcome ^_^