Question

urgent va rog frumos​

Answer 1

Răspuns:

Explicație pas cu pas:

1 DVA   2x-3≠0     2x≠3           x≠3/2

DVA=R\{3/2}

2 (x²-2)/(2x+1)   pt x=-3    ⇒ (9-2)/(-6+1)=-7/5

3 a) 8xy×5x/40×5x=2xy×5x/10×5x=5x²y/25x

b)3x(x+3)/(x²-9)

4

a)  (4-x)/(4-x)(4+x)=1/(4+x)

b)x(x-3)/(x-3)(x+3)=x/(x+3)