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1. I'm unsure how to answer this question can someone explain it to me?

Find the range of values of p for which the roots of the equation px^2 + px - 2 =0

Apparently the answers are: p < or equal to -8 or p > or equal to 0
2. (Original post by __jessxo)
I'm unsure how to answer this question can someone explain it to me?

Find the range of values of p for which the roots of the equation px^2 + px - 2 =0

Apparently the answers are: p < or equal to -8 or p > or equal to 0
Think about how many distinct roots a quadratic equation can have- you should know that it's either 0, 1 or 2. The question is asking when the equation has any roots, so either one or two. What condition is true for an equation to have one or two roots- hint: it relates to the discriminant.

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Updated: October 9, 2016
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