# Use Descartes's Rule of Signs to determine the possible numbers of positive and

**Question description**

Use Descartes's Rule of Signs to determine the possible numbers of positive and negative zeros of the function.

^{4}+ 6x + 7

h(x)

is . Therefore, the number of real zeros of*h*is .

The number of variations in sign in

h(−x)

is . Therefore, the number of real zeros of*h*is .

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