Como resolver por formula general 2x² - x - 6 = 0?

Question

Como resolver por formula general 2x² - x - 6 = 0.

Elmejorlove99 · Accepted Answer

2х² - х - 6 = 0 ; D = b² - 4ac = 1 - 4 * 2 * ( - 6) = 49. √D = 7 ; x1 = (1 + 7) / 4 = 2 ; x2 = (1 - 7) / 4 = - 1, 5. Responder : 2 ; - 1, 5.

Sqbrina · Answer

Resolver.

2x² - x - 6 = 0

a = 2

b = - 1

c = - 6

x = [ - b ± √b² - 4ac] / 2a

x = [ - ( - 1) ± √( - 1)² - 4(2)( - 6)] / 2 * 2

x = [ + 1 ± √1 + 48] / 4

x = [1 ± √49) / 4

x = [ 1± 7] / 4

x1 = (1 + 7) / 4

x1 = 8 / 4

x1 = 2 o

x2 = (1 - 7) / 4

x2 = - 6 / 4

x2 = - 3 / 2

Solucion.

( - 3 / 2 , 2).

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