(5x-1)*(5x+1)-(5x-3)^2 =50\\ 25x^2-1-(25x^2-30x+9)=50\\ 25x^2-1-25x^2+30x-9=50\\ 30x-10=50\\ 30x=60\\ x=2 " alt="
(5x-1)*(5x+1)-(5x-3)^2 =50\\ 25x^2-1-(25x^2-30x+9)=50\\ 25x^2-1-25x^2+30x-9=50\\ 30x-10=50\\ 30x=60\\ x=2 " align="absmiddle" class="latex-formula">