Question

3x2 - 8x + 7 = 2x2 - 2x + 2​

Answer 1

3x² - 8x + 7 = 2x² - 2x + 2

3x² - 2x² - 8x + 2x + 7 - 2

x² - 6x + 5 = 0

delta = b² - 4ac

delta = (-6)² - 4.1.5

delta = 36 - 20 = 16

x = ( - b +- raiz de delta ) / 2a

x = ( - (-6) +- raiz de 16 ) / 2.1

x = ( 6 +- 4 ) / 2

x' = ( 6 - 4 ) / 2 = 2 / 2 = 1

x" = ( 6 + 4 ) / 2 = 10 / 2 = 5