Question

resposta dá conta x ao quadrado -12x+35=0

Answer 1

$x^{2}-12x+35=0 \\ D=(-12)^{2}-4.1.35 \\ D=144-140=4 \\ x= \frac{-(-12)+- \sqrt{4} }{2.1} \\ x_1= \frac{12+2}{2}= \frac{14}{2}=7 \\ x_2= \frac{12-2}{2}= \frac{10}{2}=5$