Question

-3+3x+10-5x＝ x12-4x+15

Answer 1

Respuesta:

Explicación paso a paso:

- 3+3x+10 - 5x = x^2 - 4x + 15

- 2x + 7 = x^2 - 4x + 15

0 = x^2 - 4x + 2x + 15 - 7

0 = x^2 - 2x + 8

x^2 - 2x + 8 = 0

a = 1; b = -2; c = 8

∆ = b^2 - 4(a)(c)

∆ = (-2)^2 - 4(1)(8)

∆ = 4 - 32

∆ = -28 = (4)(7)(-1)

x = - b ±√∆/ 2(a)

x = -(-2)±√(4 )(7)(-1)/2(1)

x = 2 ±√4 • √7 • √-1 /2

x = 2 ± 2√7 i/2

x = 1 ±√7 i