Tabbiejack
graph the function. identify the vertex and axis of symmetry.
f(x)=-2x^2+2x-1
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Bad2zBone
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Do you know what the function should look like?
Tabbiejack
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|dw:1370231113472:dw|
Tabbiejack
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|dw:1370231141279:dw|
Bad2zBone
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Well that is a good start already. To work out the axis of symmetry, you need to work out the maximum y value, for example. To sketch the graph - you need to know some points
|dw:1370231232831:dw|
Bad2zBone
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Set y = 0 and solve the equation for x.
Tabbiejack
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ok
Bad2zBone
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Hold on
Bad2zBone
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This function never crosses the x axis, therefore there would be no solutions for x.
Tabbiejack
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o ok
Tabbiejack
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so the answer is?