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Adalyn Hill
26 November, 07:46
R2+2r-33=0 solve by completing the square
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Felicity Richard
26 November, 09:38
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R^2+2r-33=0 move constant to other side by adding 33 to both sides
r^2+2r=33 halve the linear coefficient, square it and add to both sides, in this case it is just one
r^2+2r+1=34 now the left side is a perfect square ...
(r+1) ^2=34 take the square root of both sides ...
r+1=34^ (1/2) subtract 1 from both sides
r=-1+34^ (1/2) and - 1-34^ (1/2)
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