Question

GPT: 

a) 3x² + 5x + 2 = 0                                           b) x² - 8x + 16 = 0

c) x³ - 3x + 2 = 0                                             d) |x² - 4x + 4 + 3| + 10 = |-13|

e) |x + 3/4| - 4x + 2 = 0

Answer 1

a>  phan tich thanh nhan tu ; (x+1)(3X+2)=0

=> x=-1,2|3

Answer 2

ko biet lam 

Answer 3

c) f(x) = x^3 - 3x - 2 
f(-1) = (-1)^3 -3(-1) - 2 = -1 + 3 - 2 = 0 



x^3 - 3x - 2 
= (x+1)(x^2 - x - 2) 
= (x+1)(x^2 - 2x + x - 2) 
= (x+1)(x(x-2)+1(x-2)) 
= (x+1)(x+1)(x-2) 
= (x-2)(x+1)^2 

x = {-1, -1, 2} x=-1