Expand and simplify the following

expressions.

(a) (a - 2) 2

Answer:0

Step-by-step explanation: Calculation:

(

a

-

2

)

2

=

0

a

2

-

4

a

+

4

=

0

p

=

1

;

q

=

-

4

;

r

=

4

D

=

q

2

-

4

p

r

=

4

2

-

4

⋅

1

⋅

4

=

0

D

=

0

a

1

,

2

=

-

q

±

D

2

p

=

4

±

0

2

=

2

±

0

a

1

,

2

=

2

±

0

a

1

=

a

2

=

2

Factored form of the equation:

(

a

-

2

)

(

a

-

2

)

=

0

(a-2)

2

=0

a

2

-4a+4=0

p=1; q=-4; r=4

D=q

2

-4pr=4

2

-4⋅1⋅4=0

D=0

a

1,2



=

2p

-q±

D





=

2

4±

0





=2±

0



a

1,2



=2±0

a

1



=a

2



=2

Factored form of the equation:

(a-2) (a-2) = 0

2a-4 is the answer you're looking for