Question

X²-15x=0 equação de 2 grau em r

Answer 1

Resposta:

x^2 - 15x = 0

x × ( x - 15 ) = 0

x = 0 / x - 15

x^2 - 15x =0

x × ( x - 15 ) = 0

$\frac{0}{x - 15} \times ( \frac{0}{x - 15} - 15) = 0$

$\frac{0}{x - 15} \times \frac{0 - 15}{x - 15} = 0$

$\frac{0}{x - 15} \times ( \frac{ - 15}{x - 15} ) = 0$

15x + 225 = 0

15x = -225

$x = \frac{225}{15}$

x = 15

${x}^{2} - 15x = 0$

${15}^{2} - 15 \times 15 = 0$

15 × 15 - 15 × 15 = 0

225 - 225 = 0