Proszę o zrobienie zadań
Wykonaj działania,odpowiedź podaj w najprosztszej postaci.
1 e) 3/x + 1/(x + 2) =
3(x + 2x) + x
x(x + 2) =
3x + 6 + x
4x + 6
x(x + 2)
f) 5/x - 2/(x - 3) =
5(x - 3) - 2x
x(x - 3) =
5x - 15 - 2x
3x - 15
x(x - 3)
2 e) x/(x+5) + 2 - 3x/(3x - 1) =
x(3x - 1) + (2 - 3x)(x +5)
(x + 5)(3x - 1) =
3x^2 - x + 2x + 10 - 3x^2 - 15
x-5
(x+ 5)(3x - 1)
f) 2x + 1/ (6 - x) - 3 - 2x/(x + 6) =
(2x + 1)(x + 6) - (3 - 2x)(6 - x)
(6 - x)(x + 6) =
2x^2 + 12x + x + 6 - 18 +3x - 12x - 2x^2
4x - 12
(6 - x)(x + 6)
3 e) x + 2/x^2 - x + 3/ (x^2 + x) =
(x^2 + 2) (x^2 + x) - x^2(x + 3)
x^2(x^2 + x) =
x^4 + x^3 + 2x^2 + 2x - x^3 - 3x^2
x^4 + x^3 =
x^4 - x^2 + 2x
x(x^3 - x + 2)
x(x^3 + x^2) =
x^3 - x + 2
x^3 + x^2
f) x - 1 /(x^2 + x) + x + 1/(x^2 - x) =
x - 1 + x + 1
x(x + 1) x(x - 1) =
(x - 1)^2 + (x + 1)^2
x(x + 1)(x - 1) =
x^2 - 2x + 1 + x^2 + 2x + 1
x(x^2 - 1) =
2x^2 + 2
2(x^2 + 1)
x(x^2 - 1)
Mam nadzieję, że pomogłam i że wszystko będzie czytelne :D
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1 e) 3/x + 1/(x + 2) =
3(x + 2x) + x
x(x + 2) =
3x + 6 + x
x(x + 2) =
4x + 6
x(x + 2)
f) 5/x - 2/(x - 3) =
5(x - 3) - 2x
x(x - 3) =
5x - 15 - 2x
x(x - 3) =
3x - 15
x(x - 3)
2 e) x/(x+5) + 2 - 3x/(3x - 1) =
x(3x - 1) + (2 - 3x)(x +5)
(x + 5)(3x - 1) =
3x^2 - x + 2x + 10 - 3x^2 - 15
(x + 5)(3x - 1) =
x-5
(x+ 5)(3x - 1)
f) 2x + 1/ (6 - x) - 3 - 2x/(x + 6) =
(2x + 1)(x + 6) - (3 - 2x)(6 - x)
(6 - x)(x + 6) =
2x^2 + 12x + x + 6 - 18 +3x - 12x - 2x^2
(6 - x)(x + 6) =
4x - 12
(6 - x)(x + 6)
3 e) x + 2/x^2 - x + 3/ (x^2 + x) =
(x^2 + 2) (x^2 + x) - x^2(x + 3)
x^2(x^2 + x) =
x^4 + x^3 + 2x^2 + 2x - x^3 - 3x^2
x^4 + x^3 =
x^4 - x^2 + 2x
x^4 + x^3 =
x(x^3 - x + 2)
x(x^3 + x^2) =
x^3 - x + 2
x^3 + x^2
f) x - 1 /(x^2 + x) + x + 1/(x^2 - x) =
x - 1 + x + 1
x(x + 1) x(x - 1) =
(x - 1)^2 + (x + 1)^2
x(x + 1)(x - 1) =
x^2 - 2x + 1 + x^2 + 2x + 1
x(x^2 - 1) =
2x^2 + 2
x(x^2 - 1) =
2(x^2 + 1)
x(x^2 - 1)
Mam nadzieję, że pomogłam i że wszystko będzie czytelne :D