(4x^2-25)/(2x-5)=14 we hates fractions so m ultiply both sides by (2x-5) 4x^2-25=14(2x-5) 4x^2-25=28x-70 add 70 to both sides 4x^2+45=28x subtract 28x fromoth sides 4x^2-28x+45=0 use quadratic formula which is if you have ax^2+bx+c=0 then x= a=4 b=-28 c=45 subsitute x= x= x= x= or if we were to put 5/2 for x, the deonomentor would be equal to zero, so it cannot be used