Question

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Answer 1

Use the quadratic formula:

For any quadratic of the form:
\[ax^2 + bx + c = 0\]

y = 0 when:
\[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]

Answer 2

You can also try factoring :)

Answer 3

Finding zeros is just another way of saying find the roots, you can factor normally, what 2 numbers give you -1 when you add them, and -2 when you multiply them.