Question

AJUTATIMA VA ROG AM NEVOIE URGENT DAU COROANA

Answer 1

a)x-4(x+1)<= -3
x-4x+4<= -3
3x<= -3+4
3x<= 1
x<=1-3
x<= -2


b)x(x-1)(x-5)>= 0
x($x^{2}$-5)>=
$x^{3}$-5x>=0
$x^{3}$>=5x
$x^{3}$/x>=5
$x^{2}$=5

c)$\frac{5}{x-4} * \frac{3}{2x-2} = \frac{x-2}{2(x+1)}$
$\frac{15}{9x-2} = \frac{x-2}{2(x+1)}$
15*2(x+1)=x-2*9x-2
15*2x+2=x-18x-2
30x+2=19x-2
30x-19x= -2-2
11x= -4
x= -$\frac{4}{11}$