September 2018 1 8 Report

OKREŚL DZIEDZINĘ WYRAŻENIA :

a.

x²+3x+12

______________

(3x+6)(2-3x)(x-4)

b.

x²-2x

_____

x(x+2)

c.

13x³

_____

3x³+x²

d.

6x-3

____

4-8x

e.

4-x²

_________

x³+2x²-4x-8

PRZYKŁAD :

3x²+5

________

x²+4x+4

(x+2)² ≠ 0

(x+2)(x+2) ≠ 0

x+2 ≠ 0 ∧ x+2 ≠ 0

x ≠ -2 ∧ x ≠ -2

D≠ R\ { -2 }


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