1.what is the sum of the roots of the quadratic equation
[tex] {x}^{2} - 3 x - 21 = 0[/tex]
2.which of the following mathematical statements is a quadratic inequality?
[tex]a.5 {t}^{2} - t - 20 = 0 \\ b.9h + 18 < 0 \\ c.4 {x}^{2} + 2x - 2 > 0 \\ d. {m}^{2} + 9m + 16 = 0[/tex]
[tex] {x}^{2} - 3 x - 21 = 0[/tex]
2.which of the following mathematical statements is a quadratic inequality?
[tex]a.5 {t}^{2} - t - 20 = 0 \\ b.9h + 18 < 0 \\ c.4 {x}^{2} + 2x - 2 > 0 \\ d. {m}^{2} + 9m + 16 = 0[/tex]
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Answer:
1.
sum = 3 ((-3)/1)
product = -21 ((-21)/1)
2.
c. 4x²+2x-2>0