Question

dada a função y= x²-5x+4 determine as coordenadas​

Answer 1

Resposta:

${x}^{2} - 5x + 4 = 0 \\ x = \frac{5 + - \sqrt{ {( - 5)}^{2} - 4(1)(4)} }{2} \\ x = \frac{5 + - \sqrt{25 - 16} }{2} \\ x = \frac{5 + - \sqrt{9} }{2} \\ x = \frac{5 + - 3}{2} \\ x = \frac{5 + 3}{2} \\ ou \\ x = \frac{5 - 3}{2} \\ x = 4 \: ou \: x = 1$