Question

2° Calcule os produtos:


a) (x + 5) . (x + 2)


b) (3x + 2) . (2x + 1)


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)


É urgente!!! me ajude por favor ​

Answer 1

a) (x + 5) . (x + 2)

x.x+2x+5x+.

2

x^2+2x+5x+10

x^27x+10

b) (3x + 2) . (2x + 1)

3x.2x+3x+2.2x+2

6x^2+3x+4x+2

6x^2+7x+2

c) (x + 7) . (x - 4)

x.x-4x+7x-7.4

x^2-4x+7x-28

x^2+3x-28

d) (3x + 4) . (2x - 1)

3x.2x-3x+4.2x-4

6x^2-3x+8x-4

6x^2+5x-4

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

x.x-xy-4xy-4x.(-y)

x^2-xy-4xy+4y^2

x^2-5xy+4y^2

f) (5x - 2) . (2x - 1)

5x.2x-5x-2.2x-2.(-1)

10x^2-5x-4x+2

10^2-9x+2

g) (3x + 1) . (3x - 1)

(3x)^2-1^2

9x^2-1

h) (2x + 5) . (2x - 5)

(2x)^2-5^2

4x^2-25