Question

X elevado a dois -7x mais 10 igual a 0

Answer 1

x-7x10=0
x-70=0
0/-70= -0

Answer 2

$x^2 - 7x + 10 = 0 \\ \\ a = 1 \\ b = -7 \\ c = 10 \\ \\ x = \frac{-b\pm \sqrt{b^2-4.a.c} }{2.a} \\ \\ x = \frac{-(-7)\pm \sqrt{(-7)^2-4.1.10} }{2.1} \\ \\ x = \frac{7\pm \sqrt{49-40} }{2} \\ \\ x = \frac{7\pm \sqrt{9} }{2} \\ \\ x = \frac{7\pm3}{2} \\ \\ \\ x' = \frac{7+3}{2} \rightarrow x' = \frac{10}{2} \rightarrow x' = 5 \\ \\ x'' = \frac{7-3}{2} \rightarrow x'' = \frac{4}{2} \rightarrow x'' = 2$

Raízes:

$x' = 5 \\ x'' = 2$