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iren [92.7K]
3 years ago
14

What is the vertex of y=2x^2+4x+5

Mathematics
1 answer:
Stells [14]3 years ago
7 0

-  \frac{b}{2a}  =  -  \frac{4}{2}  =  - 2 \\ x =  - 2 \\  \\ y = 2 {( - 2)}^{2}  + 4( - 2) + 5 \\ 2(4) - 8 + 5 \\ 8 - 8 + 5 \\ y = 5 \\  \\ vertex = ( - 2 \:  \:  \: 8)
(-2,8)
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