Question

i) 5² -x=25 j) ( x + 5 ) . ( x- 3 ) = 0 k) x ( x + 1 ) . ( x +2 ) . ( x + 3 ) = 0 l) x + 1 = x + 2 por favor me ajudem ...

Answer 1

Resposta:

Explicação passo-a-passo:

I) 5² -x=25

5² - x = 25

5x5 - x = 25

25 - x = 25

- x = 25 - 25

- x = 0

x = -(0)

x = 0

j)

( x + 5 ) . ( x- 3 ) = 0

(x + 5)(x - 3) = 0

(x + 5) = 0

x + 5 = 0

x = - 5

e

(x - 3)= 0

x - 3 = 0

x = + 3

assim

x' = - 5

x'' = + 3

k) x ( x + 1 ) . ( x +2 ) . ( x + 3 ) = 0

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

x= 0

e

(x + 1) = 0

x + 1 = 0

x = - 1

e

(x + 2) = 0

x + 2 = 0

x = - 2

e

(x + 3) = 0

x + 3 = 0

x = - 3

assim

x' = 0

x'' = - 1

x''' = - 2

x"" = - 3

l) x + 1 = x + 2  

x + 1 = x + 2

x + 1 - x = 2

x - x = 2 - 1

0x = 1

x = 1/0  ( IMPOSSIVEL)