Question

(X-5/2) la a 2 -(x+5/2)la a 2

Answer 1

$(x- \frac{5}{2})^2-(x+ \frac{5}{2})^2=(x- \frac{5}{2} -x- \frac{5}{2})(x- \frac{5}{2}+x+ \frac{5}{2})=-5*2x= \\ =-10x$