7. Without actually obtaining these roots, show that +3x+7 = 0 and (a) x6-5x5- 7x2+8x+ 20 = 0 (b) am both possess imaginary roots

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
Author:Carter
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Chapter9: Quadratic Functions And Equations
Section9.3: Solving Quadratic Equations By Graphing
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#7 using Descartes's rule of sign

7. Without actually obtaining these roots, show that
+3x+7 = 0 and
(a)
x6-5x5- 7x2+8x+ 20
= 0
(b)
am
both possess imaginary roots
Transcribed Image Text:7. Without actually obtaining these roots, show that +3x+7 = 0 and (a) x6-5x5- 7x2+8x+ 20 = 0 (b) am both possess imaginary roots
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