Answer:
2x
2
−12x−30=0
−12x=30
x
−6x=15
−6x+(
6
)
=15+(
−6x+(3)
=15+(3)
−6x+9=15+9
(x−3)
=24
=(
−
+
24
x−3=(
4(6)
x=3(
)2
x = 3 - 2 \sqrt{6} \: \: \: \: \: \: x = 3 + 2 \sqrt{6}x=3−2
x=3+2
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Answers & Comments
Answer:
2x
2
−12x−30=0
2x
2
−12x=30
x
2
−6x=15
x
2
−6x+(
2
6
)
2
=15+(
2
6
)
2
x
2
−6x+(3)
2
=15+(3)
2
x
2
−6x+9=15+9
(x−3)
2
=24
(x−3)
2
=(
−
+
)
24
x−3=(
−
+
)
4(6)
x=3(
−
+
)2
6
x = 3 - 2 \sqrt{6} \: \: \: \: \: \: x = 3 + 2 \sqrt{6}x=3−2
6
x=3+2
6