Show work ! solve the equation by completing the square. if necessary, round to the nearest hundredth.
x^2-18x=19

a. 1; 19
b.-1; 19
c.3; 6
d.-3; 1

solve x^2-81=0

a.0
b.-9
c.-9,9
d.9

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer