Question

Bài 1: 

a, (-2+x\(^2\))(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)=1

b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4)

c, (8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1)

d,2x\(^2\)+3(x-1)(x+1)=5x(x+1)

e,(8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x)

f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)

Answer 1

b: =>2x^2-8x+3x-12+x^2-7x+10=3x^2-17x+20

=>-12x-2=-17x+20

=>5x=22

=>x=22/5

c: =>24x^2+16x-9x-6-4x^2-16x-7x-28=20x^2-4x+5x-1

=>-16x-34=x-1

=>-17x=33

=>x=-33/17

d: =>2x^2+3x^2-3=5x^2+5x

=>5x=-3

=>x=-3/5

e: =>8x+16-5x^2-10x+4x^2-4x-8=4-x^2

=>-6x+8=4

=>-6x=-4

=>x=2/3

f: =>4(x^2+4x-5)-x^2-7x-10=3x^2+3x-6

=>4x^2+16x-20-4x^2-10x+4=0

=>6x=16

=>x=8/3