8 Fichas Refuerzo Expresiones Algebraicas 2.3r.pdf

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I.E.S. SUEL DPTO. DE MATEMATICAS

REF. MATEMATICAS 3º E.S.O. CURSO 2.006-2.007

SACAR FACTOR COMUN. IDENTIDADES NOTABLES FECHA:

NOMBRE:

1. Saca factor común: a) x4 + 5x3 + x² - 7x = b) 4x³ + 2x² = c) 2x6 + 12x4 - 8x² = d) 13x4 + 26x3 + 13x² = e) 24x5 + 12x4 + 8x² - 8x + 40 = f) 2x4 + 10x3 + 13x² = g) 2xy – 5x²yz +7xyz = h) 15 a4b3c2 – 5ª2b3c4 + 20 a3b3c3 = i) 12m5n3p2 – 5n3p + 10 m2n4p4 - 20 np6 = 2. Desarrolla las siguientes igualdades notables y simplifica: a) (x + 1)² = b) (x - 3)² = c) (2x - 1)² = d) (5x + 2)² = e) (2x – 5)² = f) (x + 1) (x – 1) = g) (2x + 5) (2x – 5) = h) (x² + 2) (x² – 2) = i) (3 – 4x) (3 + 4x) = j) (x – 3y)² = k) (4x² - 2x)² = l) (4 – 3x)² = 2

x  m)  − 2  = 3  2

n) o) p) q) r) s) t) u) v) w) x)

 2x y   +  =  3 2  y x  y x  + ⋅ −  =  4 3  4 3 (2x + 3)² - (2x – 3)² - x(x + 3) = (x + 1)² - (x + 2) (x –3) –x = (x – 5) (x + 5) + (x +2)² = (x + 2) (x – 2) + (x² - 1)² = (x² - x) (x² + x) (2x – 4)² - (x - 2)² + (x - 4) (x + 4) = (2x-3)² - (x + 1) (x – 1) + (3x + 2)² = (x + 2) (x – 2) - 2(x – 1)² + (3x + 1)² = (x + 1) (x – 1) – 3(x + 2) – x(x + 2) = 2

 2x 3   1  y)  −  −  − 2 x  =  3 2 4  2

3  3  3  z)  2 x −  ⋅  2 x +  +  2 x −  = 2  2  2 

1

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