Question

x2-12×+35=0 min ajudem?

Answer 1

x²-12+35=0

x²+23=0

x²=-23

x∉R

Answer 2

x² - 12x + 35=0

Δ = b² - 4ac = (-12)² - 4. 1 . 35 = 144 - 140 = 4

[- b ± √4 ] / 2a // [- (- 12) ± √4 ] / 2. 1 // [12 ± 2 ] / 2 //

x1 = [12 + 2 ] / 2  = 14/2 = 7

x2 = [12 - 2 ] / 2  = 10/2 = 5

X1 =7

x2 = 5