Question

Qual é o termo de 5x²-9x-2=0

Answer 1

5x² + 9x - 2 = 0

a = 5; b = 9; c = -2

x= [- b ± √b² - 4ac)] / 2a x= [-9 ± √(9²-4.5. [-2]]/2.5

X=[-9 ± √(81+40)] / 10

X=[-9+√121] / 10

x = [-9 +11] / 10

x'=[-9-11]/10 = -20/10 = -2 x"=[-9+11] / 10 = 2/10 = 0,2

S = (-2, 0.2}