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kicyunya [14]
3 years ago
10

2: Solve for x: 2x 2= 4x + 8

Mathematics
2 answers:
deff fn [24]3 years ago
7 0
2x-4x=8-2
-2x=6
X=6/-2
X=-3
Verizon [17]3 years ago
6 0

Step-by-step explanation:

2x^2 - 4x - 8 = 0

x^2 - 2x - 8 =0

x = 2 ( - )(+) \sqrt{2 {}^{2}  +  4.1.4 }   \div 2.1 \\ x = 2( + )( - ) \sqrt{4 +  16}  \div 2 \\ x = 2( - )( + ) \sqrt{20}  \div 2 \\ x = 2( - )( + )2 \sqrt{5}  \div 2 \\ x = 2(1( - )( + ) \sqrt{5} \div  2 \\ thefore \: x = 1 +  \sqrt{5}  \: or \: x = 1 -  \sqrt{5}

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