Question

solve the equation by competing the square. if necessary, round the nearest hundredth.
x^2 - 18x = 19
a. 1; 19
b. -1; 19
c. 3; 6
d. -3; 1

Answer 1

@amorfide

Answer 2

okay so to complete the square

\[Ax ^{2} + Bx = C\]

make it equal to 0

\[Ax ^{2} + Bx + C = 0\]

completing the square has a formula

\[(x+\frac{ B }{ 2 }) - (\frac{ B }{ 2 })^{2} + C = 0\]

Answer 3

oops

Answer 4

\[(x+\frac{ B }{ 2 })^{2} - (\frac{ B}{ 2 })^{2} + C =0\]

Answer 5

sorry I forgot to square it in my first post

Answer 6

can you do this?