Question

1) Resolva as equaçõe abaixo:

a) (x+1)3+3(x+1)+2x=0

b) 2(x+2)+2(x+1)=2

c)
$\sqrt{2} (x + 1) = \sqrt{2} (2x + 2)$
d)
$\frac{x}{2 } + \frac{x}{2} + \frac{x}{2} = \sqrt{ {x}^{2} } + 2$

Me ajudem pfv ​

Answer 1

a) ( x + 1 )3 + 3( x + 1 ) + 2x = 0

( x + 1 )3.2 + 2x = 0

6x + 6 + 2x = 0

8x = 6

x = 3/4

b) 2( x + 2 ) + 2( x + 1 ) = 2

2(( x + 2 ) + ( x + 1 )) = 2

( x + 2 ) + ( x + 1 ) = 2/2

2x + 3 = 1

x = - 1

c) √2( x + 1 ) = √2( 2x + 2 )

x + 1 = 2x + 2

x = - 1

d) x/2 + x/2 + x/2 = √x" + 2

3x/2 - 2 = x

x + 2 = 3x/2

3x = 2x + 4

x = 4