a fost răspuns

Descompuneti in factori termenii fiecarui raport si apoi simplificati :
 a) 2a-2b supra 4a
b) 4x-4y supra 8a+8b
c)4x+4y supra 12x+12y
d) ab supra a-ab
e) x la a treia  - 2x la a doua supra x la a doua - 4
f)2x la a doua +8x+8 supra (x+2) la a doua 

Răspuns :

Aeerdnadeutzaid
a)2a-2b/4a=2(a-b)/4a=a-b/2a
b)4x-4y/8a+8b=4(x-y)/4(2a+2b)=x-y/2a+2b
c)4x+4y/12x+12y=4(x+y)/4(3x+3y)=x+y/3x+3y=x+y/3(x+y)=1/3
d)ab/a-ab=ab/a(1-b)=b/1-b
e)x³-2x²/x²-4=x²(x-2)/(x-2)(x+2)=x²/x+2

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