Question

tim x:

(x-1)(x+2)-x^2+3=5

(x-2)(3x+4)=3x(x-2)

5(x-3)+(x-2)(5x-1)=5x^2

Answer 1

Tuyet Anh Nguyen

1.a)(3x-2)(4x+5)=0 
12x^2+7x-10=0>>x1=2/3,x2=-5/4 
b)4x^3+2x^2+4x+2=0>>x=-1 
c)0,23x^2-4,21x-13,8=0>>x1=21,14,x2=-2,8... 
d)10x^3-13x^2-178x-35=0>>x1=5,x2=-1/5 
b2/a)2x^3+5x^2-3x=0>>x1=1/2,x2=-3 
b)(3x-1)(x^2-7x+12)=0>>x1=1/3,x2=4,x3=... 
b3/ 
a)x^2+x-2=0>>x1=1,x2=-2 
b)x1=-1,x2=-6 
b4/a)0,5x^2-1,5x-1,5x^2+x+4,5x-3=0>>-x... 
b)3x/7-1=3x/7-x>>x=1 
c)2x^2-13x+15=0>>x1=5,x2=3/2

P/s: Tham khảo nha

Answer 2

a)0

b)-1

c)-2,8......

k cho tui