Answer:
(x-1)(x+1)(x+5)
Step-by-step explanation:
x^3+5x^2 - x-5=
x^3-x+5x^2-5=
x(x^2-1) +5(x^2 - 1)=
(x^2- 1)(x+5)=(*)
(x-1)(x+1)(x+5)
(*) A^2 - B^2 =(A-B)(A +B)
In general you can multiply through by the LCD
For example solve :-
2/x + 1 / (1+ x) = 11/12
The LCD is 12x(x + 1).
Now we multiply each term by 12x(x + 1)
2*12(x+1) + 12x = 11x(x + 1)
and this is solved in the usual way.
x − 3 = 6 − 2 x = − 8 √ x = 3
One dinner = 22.65
4 dinners = 22.65 x 4 = $90.60
one lunch = 10.95
5 lunches = 10.95 x 5 = $<span>54.75
one breakfast = 6.53
</span>3 breakfasts = 6.53 x 3 = 19.59
Total = $90.60 + $54.75 + $19.59 = $164.94
