Question

Polinomio por polinomis
Calcule:
a) (x+5).(x+2)
b)(3x+2).(2x1)
c)(x+7).(x-4)
d)(3x+4).(2x-1)
e)(x-4y).(x-y)
f)(5x-2).(2x-1)
g)(3x+1).(3x-1)
h)(2x+5).(2x-5)
URGENTE!

Answer 1

a)
= (x + 5).(x + 2)

= x² + 2x + 5x + 10

= x² + 7x + 10
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)

= (3x + 2).(2x + 1)

= 6x² + 3x + 4x + 2

= 6x² + 7x + 2

Se for (2x - 1)

b)
= (3x + 2).(2x - 1)
= 6x² - 3x + 4x - 2
= 6x² + x - 2
***********************

c)

= (x + 7).(x - 4)

= x² - 4x +7x - 28

= x² + 3x - 28
***************************

d)
= (3x + 4).(2x - 1)

= 6x² - 3x + 8x - 4

= 6x² + 5x - 4

***************************
e)
= (x - 4y).(x - y)

= x² -xy - 4xy + 4y²

= x² - 5xy + 4y²
¨*****************************
f)

= (5x - 2).(2x - 1)

= 10x² - 5x - 4x + 2

= 10x² - 9x + 2
**********************************
g)
= (3x + 1).(3x - 1)

= (3x)² - 3x + 3x - 1

= 9x² - 1
*******************************

h)

= (2x + 5).(2x - 5)

= (2x)² - 10x + 10x - 25

= 4x² - 25
*********************************

Answer 2

Espero ter te ajudado.