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Popular >

5z^2+8z-21<= 0

Solution

5 z^{2} + 8 z - 21 \leq 0

Solution

- 3 \leq z \leq \frac{7}{5}

+2

Interval Notation

[- 3, \frac{7}{5}]

Decimal Notation

- 3 \leq z \leq 1.4

Solution steps

5 z^{2} + 8 z - 21 \leq 0

Factor

5 z^{2} + 8 z - 21 : (5 z - 7) (z + 3)

(5 z - 7) (z + 3) \leq 0

Identify the intervals

- 3 \leq z \leq \frac{7}{5}

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Frequently Asked Questions (FAQ)

What is 5z^2+8z-21<= 0 ?
The solution to 5z^2+8z-21<= 0 is -3<= z<= 7/5