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Popular >

3x^2-4x<2x^2+21

Solution

3 x^{2} - 4 x < 2 x^{2} + 21

Solution

- 3 < x < 7

+1

Interval Notation

(- 3, 7)

Solution steps

3 x^{2} - 4 x < 2 x^{2} + 21

Rewrite in standard form

x^{2} - 4 x - 21 < 0

Factor

x^{2} - 4 x - 21 : (x + 3) (x - 7)

(x + 3) (x - 7) < 0

Identify the intervals

- 3 < x < 7

Popular Examples

(240-80x)/3*0.22=(80x)/3*0.21

\frac{240 - 80 x}{3} \cdot 0.22 = \frac{80 x}{3} \cdot 0.21

16 x^{2} = 56 x - 51

factor 6x(x-4)^4+12x^2(x-4)^3 factor

6 x (x - 4)^{4} + 12 x^{2} (x - 4)^{3}

4 - 2 n = 3 (7 + 2 n) - 1

factor 4a^4-9b^2c^2 factor

4 a^{4} - 9 b^{2} c^{2}

Frequently Asked Questions (FAQ)

What is 3x^2-4x<2x^2+21 ?
The solution to 3x^2-4x<2x^2+21 is -3<x<7