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Illusion [34]
3 years ago
8

Hi, please help me, explain please

Mathematics
2 answers:
drek231 [11]3 years ago
6 0

Answer:

\sf \hookrightarrow \: {2x}^{2}  +  3x + k = 0 \\  \sf \hookrightarrow \: 2 {(2)}^{2}  + 3(2) + k = 0 \\  \sf \hookrightarrow \: 2 \times 4 + 6 + k = 0 \\  \sf \hookrightarrow \: 8 + 6 + k = 0 \\  \sf \hookrightarrow \: 14 + k =  0 \\  \sf \hookrightarrow \: k =  - 14

lisabon 2012 [21]3 years ago
5 0

Answer:

Step-by-step explanation:

1) substitute x with 2

2*2^2 + 3*2 + k = 0

2) solve the equation

8 + 6 + k = 0

k  + 14 = 0

k = -14

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