125k views
4 votes
Can someone do these three problems for me please <3

Can someone do these three problems for me please <3-example-1
User Idbentley
by
7.0k points

2 Answers

4 votes

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..

User Subrata Sarkar
by
6.5k points
4 votes

Answer:

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

User LambdaBeta
by
7.5k points