Question 886476
Solving equations by completing the square! 
r^2+2r-33=0. 6. a^2-2a-48=0.
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r^2+2r-33=0
add 1/2 the coefficient of the r-term squared, then add (-1) to balance the equation.
(r^2+2r+1)-1-33=0
(x+1)^2=34
take sqrt of both sides
x+1=±√34
x=-1±√34
x=-1-√34
or
x=-1+√34
..
a^2-2a-48=0
add 1/2 the coefficient of the a-term squared, then add (-1) to balance the equation.
(a^2-2a+1)-1-48=0
(x-1)^2=49
take sqrt of both sides
x-1=±√49
x=1±7
x=-6
or
x=8