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REDUCCIÓN A TÉRMINOS SEMEJANTES 1. Simplifica las siguientes expresiones algebraicas: a) 4p + 5p –7p = b) –12a + 4a + a – 8a = c) –x + 7,2x + 2x – 3,5x + 4 =

d)

4 5 x  x  2x  x  3 2

e) 9x2 – 3x + 5x – 5x2 =

f)

2 3 1 2 x y xy  x y  3 4 6 9

g) x3 – x2 + 4x3 – x2 +x2y  xy2 + 2 – 3x2y = 2. Simplifica las siguientes expresiones algebraicas: a) (9x – 4y) · (2) + (3x + 2y) = b) (–3b + 2c) – (2b – c) = c) 0,4x – [(1,2 + 0,6y) + (2,5 – x)] – (–0,5 – 2,6y) = d) –[3x – (2x + y) + 2 · (–3x – 3y)] – (x – 4y) =

e) 

1 x y     z     x  y  z  34 2 

f) (mn2 – 4m + 3m2) · 2 – [– (m2n + 4m2 – n2) + 3m] = 4  1 9   1   2 g)    ·  x  x    x  x   3  2 2   5   3

REDUCCIÓN A TÉRMINOS SEMEJANTES (Soluciones) 1. Simplifica las siguientes expresiones algebraicas: a) 4p + 5p –7p = 2p b) –12a + 4a + a – 8a = 15a c) –x + 7,2x + 2x – 3,5x + 4 = 4,7a + 4

d)

4 5 5 x  x  2x  x  x 3 2 6

e) 9x2 – 3x + 5x – 5x2 = 4x2 +2x

f)

2 3 1 2 1 17 x y xy  x y  x  y 3 4 6 9 6 36

g) x3 – x2 + 4x3 – x2 +x2y  xy2 + 2 – 3x2y = 5x3 – 2x2 – 2x2y  xy2 + 2

2. Simplifica las siguientes expresiones algebraicas: a) (9x – 4y) · (2) + (3x + 2y) = 15x + 10y b) (–3b + 2c) – (2b – c) = 5b + 3c c) 0,4x – [(1,2 + 0,6y) + (2,5 – x)] – (–0,5 – 2,6y) = 1,4x + 2y  3,2 d) –[3x – (2x + y) + 2 · (–3x – 3y)] – (x – 4y) = 4x + 11y

e) 

1 x y 13 x 7 y 4z       z     x  y  z   34 2 12 6 3 

f) (mn2 – 4m + 3m2) · 2 – [– (m2n + 4m2 – n2) + 3m] = 3 mn2 + 10m2 – n2 – 11m 4  1 9  3 x  1   2 g)    ·  x  x    x  x   3  2 2  5  5   3

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