2 years ago

For what values of m does the graph of y = mx^2 – 5x – 2 have no x-intercepts?

1 answer:

8 0

$\Delta\ \textless \ 0\\
\Delta=(-5)^2-4\cdot m\cdot(-2)=25+8m\\
25+8m\ \textless \ 0\\
8m\ \textless \ -25\\
m\ \textless \ -\dfrac{25}{8}$

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