Question

Formula de bháskara -x²-2x+9=6 ??

Answer 1

-x²- 2x+9=6

-x² - 2x +3 = 0

∆ = (-2)² - 4.(-1).3

∆ = 4 + 12

∆ = 16


x = (2 ± √ 16)/-2

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

x" = (2 + 4)/-2 = - 3


S = { 1 , -3 }