Решить уравнение x^2=2x+8

Question

Решить уравнение x^2=2x+8

Comments

x^2 = 2x + 8x^2 - 2x - 8 = 0D = (-2)^2 - 4*1*(-8) = 4 + 32 = 36 = 6^2x1 = 2 + 6 / 2*1 = 8/2 = 4x2 = 2 - 6 / 2 = -4/2 = -2

Answer 1

X^2 = 2x + 8
x^2 - 2x - 8 = 0
D = (-2)^2 - 4*1*(-8) = 4 + 32 = 36 = 6^2
x1 = 2 + 6 / 2*1 = 8/2 = 4
x2 = 2 - 6 / 2 = -4/2 = -2

Answer 2

Х²≡2х+8
ײ-2х-8=0
Д=-2²-4×1×(-8)=4+32=36=6²
Х1=(2+6)/2= 4
Х2=(2-6)/2= -2