Question

menos 2X elevado a 2 + 10 x = 0

Answer 1

${ - 2x}^{2} + 10x = 0$
$x = \frac{ - 10 + - \sqrt{ {10}^{2} - 4 \times ( - 2) \times 0 } }{2 \times ( - 2)}$
$x = \frac{ - 10 + - \sqrt{ {10}^{2} - 0} }{ - 4}$
$x = \frac{ - 10 + - \sqrt{ {10}^{2} } }{ - 4}$
$x = \frac{ - 10 + - 10}{ - 4}$
$x = \frac{ - 10 + - 10}{4}$
$x = \frac{ - 10 + 10}{4} \\ x = \frac{ - 10 - 10}{4}$
$x = 0 \\ x = 5$

Answer 2

-2x²+10x = 0 (-1)

2x² -10x =0

x(2x -10)=0

2x -10 = 0


x = 10/2

x" = 5
x' = 0

-(2x²) + 10x =0

-(10)²+ 100 = 0

-100+100=0