Question

Marque a alternativa, cuja raiz e corretamente a da equaçao: x2-3x2=0.

Answer 1

$x^{2} -3x+2=0\\\\(-3) ^{2} -4*(1)*(2)\\\\Δ=9-8=1$
-
$\frac{-(-3)+- \sqrt{1} }{2*1} \\\\ \frac{3+-1}{2} \\\\x'= \frac{3+1}{2} =2\\\\x''= \frac{3-1}{2} =1$