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Lala123456789
@Lala123456789
April 2020
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Efetue as operações indicadas entre as frações algébricas:
7x 10y 1 2 4 2x + 2 x² - 1
------ + -------- = ------ + ---- + ---- = ---------
.
-------- =
y x x² x x³ 3x + 3 2x + 2
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MATHSPHIS
Verified answer
4 votes
Thanks 2
laurelidb
mmc= yx
7x 10y x( 7x) + y (10y) 7x² + 10y²
------ + -------- = --------------------- = ----------------
y x yx yx
mmc= x³
1 2 4 x + 2x + 4 3x +4
---- + ----- + ----- =------------------= ----------
x² x x³ x³ x³
x² -1 = (x+1) (x-1) corta ( 2x +2 ) do numerador com ( 2x +2 ) do denominador
2x + 2 x²-1 (2x + 2 ) (x+1) (x-1) (x+1) (x-1) x-1
--------- . ---------- = ----------------------------- = -------------- = ------
3x +3 2x +2 3x +3 ( 2x +2 ) 3 ( x + 1) 3
2 votes
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Verified answer
7x 10y x( 7x) + y (10y) 7x² + 10y²
------ + -------- = --------------------- = ----------------
y x yx yx
mmc= x³
1 2 4 x + 2x + 4 3x +4
---- + ----- + ----- =------------------= ----------
x² x x³ x³ x³
x² -1 = (x+1) (x-1) corta ( 2x +2 ) do numerador com ( 2x +2 ) do denominador
2x + 2 x²-1 (2x + 2 ) (x+1) (x-1) (x+1) (x-1) x-1
--------- . ---------- = ----------------------------- = -------------- = ------
3x +3 2x +2 3x +3 ( 2x +2 ) 3 ( x + 1) 3