=3х/(2у+3) +х(х+3)/((4ху-2у)+(-3+6х))
=3х/(2у+3) +х(х+3)/(2у(2х-1)+3(2х-1))
=3х/(2у+3) +х(х+3)/(2у+3)(2х-1)=
=(3х(2х-1)+х(х+3))/(2у+3)(2х-1)=
=(6х^2-3х+х^2+3х)/(2у+3)(2х-1)=
=7х^2 /(2у+3)(2х-1)
ответ "А"
<span>5в*а(а-в)/(а-в)*10в= а/2=30/2=15 !!!!</span>
1) x^3-3x=x(x^2-3)
2) 5a^2-10ab-5b^2=5(a^2-2ab-b^2)
(x+1)(x^2+1)(1-x)=-(x+1)(x-1)(x^2+1)=-(x^2-1)(x^2+1)=-(x^4-1)=1-x^4
4......
0.04x^2-9=0
0.04x^2=9
x^2 = 9 /0.04
x^2 = 225
x1 = 15
x2= - 15