Question

x
${x} ^{2} - x = 12$
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Answer 1

x² - x = 12

x² - x - 12 = 0

delta = b² - 4ac

delta = (-1)² - 4.1.(-1)

delta = 1 + 4 = 5

x = ( - (-1) +- raiz de 5 ) / 2.1

x = ( 1 +- 2,23 ) / 2

x' = ( 1 - 2,23 ) / 2 = - 1,23 / 2 = - 0,615

x" = ( 1 + 2,23 ) / 2 = 3,23 / 2 = 1,615