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
