Question

Ayuda urgente porfavor

Answer 1

1.(X-2)(X+1)

= X² + X - 2X - 2

= X² - X - 2

2.(a+3)(a-2)

= a² - 2a + 3a - 6

= a² - a - 6 

3.(2a-3)(a+3)

= 2a² + 6a - 3a - 9

= 2a² + 3a - 9

4.(4X+2)(X-5)

= 4X² - 20X + 2X - 10

= 4X² - 18X - 10

5.(5X-2)(5X-2) ---> aplicando  (a-b)² = a² - 2ab + b²

= 25X² - 20X + 4

6.(3X+2)(3X-2) ---->  aplicando  (a+b)(a-b) = a² - b²

= 9X² - 4

7.(4a-b)(3a+b)

= 12a² + 4ab - 3ab - b²

= 12a² + ab - b²

8.(2X+5Y)(5X+Y)

= 10X² + 2XY + 25XY + 5Y²

= 10X² + 27XY + 5Y²

9.(2X² - 1)(3X² - 3)

= 6X⁴ - 6X² - 3X² + 3

= 6X⁴ - 9X² + 3

10.(X-3)³ ---> aplicando  (a-b)³ = a³ - 3a²b + 3ab² - b³

= X³ - 3(X)²(3) + 3(X)(3)² - (3)³

= X³ - 9X² + 27X - 27

11.(7a²-b)(3a-2b)

= 21a³ - 14a²b - 3ab + 2b²

= 21a³ - 14a²b + 2b² - 3ab

12.(a+2)³  -----> aplicando (a+b)³ = a³ + 3a²b + 3ab² + b³

= a³ + 3(a)²(2) + 3(a)(2)² + (2)³

= a³ + 6a² + 12a + 8

Saludos desde Venezuela