Question

expand (x-3) (x+3)
I'll mark the first brainlinest...n​

Answer 1

Answer:

(

−

3

)

(

+

3

)

(x-3)(x+3)

(x−3)(x+3)

Simplify

1

Distribute

(

−

3

)

(

+

3

)

{\color{#c92786}{(x-3)(x+3)}}

(x−3)(x+3)

(

+

3

)

−

3

(

+

3

)

{\color{#c92786}{x(x+3)-3(x+3)}}

x(x+3)−3(x+3)

2

Distribute

(

+

3

)

−

3

(

+

3

)

{\color{#c92786}{x(x+3)}}-3(x+3)

x(x+3)−3(x+3)

2

+

3

−

3

(

+

3

)

{\color{#c92786}{x^{2}+3x}}-3(x+3)

x2+3x−3(x+3)

3

Distribute

2

+

3

−

3

(

+

3

)

x^{2}+3x{\color{#c92786}{-3(x+3)}}

x2+3x−3(x+3)

2

+

3

−

3

−

9

x^{2}+3x{\color{#c92786}{-3x-9}}

x2+3x−3x−9

4

Combine like terms

2

+

3

−

3

−

9

x^{2}+{\color{#c92786}{3x}}{\color{#c92786}{-3x}}-9

x2+3x−3x−9

2

−

9

x^{2}{\color{#c92786}{-9}}

x2−9

Solution

2

−

9