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OpenStudy (anonymous):
x2+2x=19 complete the square
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OpenStudy (anonymous):
Firstly, move '19' on LHS. When you move a positive value from right hand side to left hand side, the positive value become negative. \[x ^{2}-2x-19=0\] Then, use 'completing the square' method |dw:1336764592535:dw| Can you find the answer now?
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