Question

Stebiliti daca : (x+a/2) la patrat - (x-a/2) la patrat = ax, a apartine R , x apartine R . HELP

Answer 1

Folosind formula $a^{2} -b^{2} = (a-b)(a+b)$ descompui expresia

$(x+\frac{a}{2}-(x-\frac{a}{2})) * (x+ \frac{a}{2}+x- \frac{a}{2)}$

$(x + \frac{a}{2}-x+ \frac{a}{2}) *2x$

(x-x se reduc, $\frac{a}{2}+ \frac{a}{2} =a$

a*2x=2ax