Question

Escreva as equacoes a seguir na forma ax²+bx+c=0, em seguida" determine os coeficientes a, b e c.

Answer 1

D) (-2x-1)(x-2)=3x+5x²

-2x²+4x-x+2=3x+5x²
-2x²+3x-3x-5x²+2=0
-7x²+2=0
-7x²=-2/.(-1)
7x²=2
X²=2/7
X=±|/2/7

_________________

E)(x+1/2)x=4x-7x/2

X²+x/2=4x-7x/2
X²+x/2=x/2
2x²+x=x
2x²=x-x
2x²=0
X=0

________________

C)x+6=4x/x-2

(x-2)(x+6) =4x
X²+6x-2x-12=4x
X²-12=0
X=±|/12

Espero ter ajudado.