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How To Get The Answer For X2-2x-13=0?

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(1) X² - 2x – 13 = 0
A) X² - 2x = 13
B) 4x ^ 2 – 8x = 52
C) 4x ^ 2 – 8x + 4 = 56
D) √ (4x ^2-8x+4) = ± √ 56
E) 2x-2 = √ 56 then x = (2 + √56) / 2 = 1 + √14
F) 2x – 2 = - √56 then x = (2- √56) 2 = 1 + √14

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