Question

Answer 1

a: =>x^2+x-6-12x+8=x^2-8x+16

=>-11x+14=-8x+16

=>-3x=2

=>x=-2/3

f: =>(x-3)(x+3)(x-7)-(x+3)(x^2+6)=0

=>(x+3)(x^2-10x+21-x^2-6)=0

=>(x+3)(-10x+15)=0

=>x=3/2 hoặc x=-3

b: =>\(3\left(2x^2+1\right)-2\left(5x-2\right)=6\left(x^2-1\right)-4\left(x-3\right)\)

=>6x^2+3-10x+4=6x^2-6-4x+12

=>-10x+7=-4x+18

=>-6x=11

=>x=-11/6

g: =>(x-5)(x+4)=0

=>x=5 hoặc x=-4

g: =>2x^3-2x^2+x-1=0

=>(x-1)(2x^2+1)=0

=>x-1=0

=>x=1

m: |3x+5|=|2-5x|

=>|3x+5|=|5x-2|

=>5x-2=3x+5 hoặc 5x-2=-3x-5

=>2x=7 hoặc 8x=-3

=>x=-3/8 hoặc x=7/2