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x+2≠0 x≠ -2
14/[x+2]*(x+2)*x-2)/7=2*(x-2)=2x-4
b)24/[x²-16] *[ x-4]/3
zał x²≠16 x≠ -4 i x≠4
24/[(x-4)(x+4)] * [x-4]/3=8/[x+4]
c)x²/[x²-9] *[x-3]/x
zał x≠0 i x²-9≠0
x≠-3 i x≠3
x²/[(x-3)(x+3)] * [x-3]/x=x/[x+3]
d)2x/[x+6] *[x²-36]/x²
zał.x≠0 i x≠-6 ix≠6
2x/[x+6] *[x²-36]/x²=2x/[x+6] *[(x-6)(x+6)]/x²=2(x-6)/x
e[4x²-1]/4 *6/[2x-1]
zał2x-1≠0
x≠1/2
[4x²-1]/4*6/[2x-1]=3(2x-1)
f)[3x+2]/3 *12/[9x²-4]
zał 9x²-4≠0 x²≠4/9 x≠ -2/3 i x≠2/3
[3x+2]/3 *12/[9x²-4]=[3x+2]/3 *12/[(3x-2)(3x+2)]=4/[3x-2]