MatemáticasBásico1 respuestas

1. Efectuar(1 + x)(x–1) – (4 + x)(x–4)2?

1. Efectuar (1 + x)(x–1) – (4 + x)(x–4) 2. Efectuar (2 + x)(x + 8) – (5 + x)2 3. Efectuar (5x + 1)2 + (5x–1)2 – 50 x2 4. Efectuar (x + 5)2 – (x–5)2 – 20x 5. Efectuar (x2 + 4)(x + 2)(x–2) – x4.

En resumen

1. - (1 + x)(x–1) – (4 + x)(x–4) (x + 1)(x–1) – (x + 4)(x–4) x ^ 2 - 1 - (x ^ 2 - 16) x ^ 2 - 1 - x ^ 2 + 16 15 2. - (2 + x)(x + 8) – (5 + x)2 2x + 16 + x ^ 2 + 8x - (25 + 10x + x ^ 2) 10x + 16 + x ^ 2 - 25 - 10x - x ^ 2 - 9 3.

Mejor respuesta

Alexacaste2012
8

1. -

(1 + x)(x–1) – (4 + x)(x–4)

(x + 1)(x–1) – (x + 4)(x–4)

x ^ 2 - 1 - (x ^ 2 - 16)

x ^ 2 - 1 - x ^ 2 + 16

15

2.

-

(2 + x)(x + 8) – (5 + x)2

2x + 16 + x ^ 2 + 8x - (25 + 10x + x ^ 2)

10x + 16 + x ^ 2 - 25 - 10x - x ^ 2 - 9

3.

-

(5x + 1)2 + (5x–1)2– 50 x ^ 2

2 ((5x) ^ 2 + 1) - 50x ^ 2

2 (25x ^ 2 + 1) - 50x ^ 2

50x ^ 2 + 2 - 50x ^ 2

2

4.

-

(x + 5) ^ 2– (x–5) ^ 2– 20x

4 (x)(5) - 20x

20x - 20x

0

5.

-

(x ^ 2 + 4)(x + 2)(x–2) – x ^ 4

(x ^ 2 + 4)(x ^ 2 - 4) – x ^ 4

(x ^ 2) ^ 2– 4 ^ 2 - x ^ 4

x ^ 4 - 16 - x ^ 4 - 16.