Question

Qual o resultado por favor respondam? 1) x²-5x+6=0 2) 2x +5=2 3) 4-2x=3x -3 Obrigado ❤️!

Answer 1

Resposta:

Explicação passo-a-passo:

1)

$x^2-5x+6=0\\\Delta=(-5)^2-4.1.6=1\\\\x=\dfrac{-(-5)\pm\sqrt{1}}{2.1}\\\\x=\dfrac{5\pm1}{2}\\\\x'=3\\x''=2$

2)

$2x+5=2\\2x=2-5\\2x=-3\\x=-\frac{3}{2}$

3)

$4-2x=3x-3\\-2x-3x=-3-4\\-5x=-7.(-1)\\5x=7\\x=\frac{7}{5}$