Question

multimea solutilor ecuatiei (2 x-3 x) puterea2=169 este S={ ....}

Answer 1

(2x-3x)²=169

(-x)²=169
 (-x) * (-x) =169
x²=169
x²-169=0
x²-13²=0
 (x-13)(x+13)=0
x-13=0  x=13
x+13=0  x=-13

s={-13;13}