Question

solve for x: (2x-5)^2=121

Answer 1

x=8

Answer 2

careful here

Answer 3

\[(2x-5)^2=121\]
\[2x-5=11\] or
\[2x-5=-11\] so get two answers

Answer 4

ohhhh... right

Answer 5

4x^2-20x+25-121=0
4x^2-20x-96=0
D=b^2-4ac
and if D>0 then

Answer 6

\[2x-5=11\]
\[2x=16\]

\[x=8\] or
\[2x-5=-11\]
\[2x=-6\]
\[-3\]