Question

resolva se for inteligente hahaha

3= 4x+5x²

3x²-5x+6=0

matéria equação de 2 grau

Answer 1

$3 = 4x + 5 x^{2}$
$5 x^{2} + 4x - 3 = 0$

Δ$= (4) ^{2} - 4*5*(-3)$
Δ$= 16 - (-60)$
Δ$= 16 + 60$
Δ$= 76$

$x_{I} = \frac{- (+4) + \sqrt{76} }{2*5}$
$x_{I} = \frac{-4 + \sqrt{2^{2} *19 } }{10}$
$x_{I} = \frac{-4 + 2 \sqrt{19} }{10}$

$x_{II} = \frac{-4 - 2 \sqrt{19} }{10}$

---------------------------------------------------------------

$3 x^{2} - 5x + 6 = 0$

Δ$= (-5) ^{2} - 4*3*6$
Δ$= 25 - 72$
Δ$= -47$

∉{IR}