2.dereceden denklemler

Question

$x^2$-9 = (x-3) × (x+5)

denkleminin çözümkümesi nedir? ??

Comments

$(x-3)(x+3)-(x-3)(x+5)=0  \Rightarrow (x-3)[x+3-(x+5)]=0$

Answer 1

$(x-3)(x+3)=(x-3)(x+5) \\ (x-3)(x+3-x-5)=0 \\ -2(x-3)=0 \\ x-3=0 \\ x=3$