Question

Answer 1

b: (2x-5)(5+2x)-(2x+1)^2=9

=>4x^2-25-4x^2-4x-1=9

=>-4x-26=9

=>-4x=35

=>x=-35/4

c: =>12x^2+3x-8x-2-12x^2+12=4

=>-5x+10=4

=>-5x=-6

=>x=6/5

a: =>x^2-6x+9-x^2+1=5

=>-6x=-5

=>x=5/6