Question

Trebuie sa simplificati
2x+2y
--------- =?
2a

3x+6x²
---------- =?
3x³

5a²-a
-------- =?
5a-1

x+3
----- =?
x²-9

x²-64
-------- =?
ax-8a

1-7a
------ =?
1-49a²

Answer 1

1.) 2(x+y)/2a= prin simplificarea lui 2 = x+y=a
2.) 3( x+ 2x^2)/3x^3
x+x^2=x^3
3).a(5a-1)/5a-1=a
4)x+3=x^2-3^2
x+3=(x+3)(x-3)
x-3=1
x=4
5)(x^2-8^2)/ a(x-8)
(x+8)(x-8)/a(x-8)=(x+8)/a
6) (1-7a)/1-(7a)^2= (1-7a)/(1+7a)(1-7a)= 1/1+7a

Answer 2

$\dfrac{2x+2y}{2a}=\dfrac{\not2(x+y)}{\not2a}=\dfrac{x+y}{a}$