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Hitman42 [59]
2 years ago
14

Find X such that f(x)=0 for f(x)= -2x^2-x

Mathematics
1 answer:
Leokris [45]2 years ago
6 0

Answer:

x=\{-\frac{1}{2} ,\:0\}

Step-by-step explanation:

f(x) =-2x^2 -x\\plug \: f(x) =0\\0= -2x^2 -x\\2x^2 + x = 0\\x(2x+1) = 0\\\therefore x =0 \: or \: 2x+1 = 0\\\therefore x =0 \: or \: 2x = -1\\\\\therefore x =0 \: or \: x = -\frac{1}{2} \\\\x=\{-\frac{1}{2} ,\:0\}

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