Question

Can someone do these three problems for me please <3

Answer 1

Explanation:

Hey there!

4. (x+3) (x-5)

Multiply them.

`= x(x - 5) + 3(x - 5)`

Simplify them to get answer.

`= {x}^(2) - 5x + 3x - 15`

`= {x}^(2) - 2x - 15`

5. (2x-4) (3x-7).

Multiply them and simplify to get answer.

`= 2x(3x - 7) - 4(3x - 7)`

`= 6 {x}^(2) - 14x - 12x + 28`

`= 6 {x}^(2) - 26x + 28`

6. (3x^2 +2x +1) (x +3)

Multiply them and simplify them to get answer.

`x(3 {x}^(2) + 2x + 1) + 3(3 {x}^(2) + 2x + 1)`

`= 3 {x}^(3) + 2 {x}^(2) + x + 9 {x}^(2) + 6x + 3`

`= 3 {x}^(3) + 11 {x}^(2) + 7x + 3`

Hope it helps..

Answer 2

see below

Explanation:

4. ( x+3) ( x-5)

FOIL

x*x - 5x + 3x -15

Combine like terms

x^2 -2x-15

5. ( 2x-4) ( 3x-7)

FOIL

2x*3x -7*2x -4*3x +28

6x^2 -14x -12x +28

Combine like terms

6x^2 -26x +28

6. ( 3x^2 +2x+1) ( x+3)

Distribute

3x^2*x + 3x^2*3 + 2x*x + 2x*3 + x+3

3x^3 +9x^2 +2x^2 +6x+x+3

Combine like terms

3x^3+11x^2+7x+3