What substitution should be used to rewrite 4x4 – 21x2 + 20 = 0 as a quadratic equation?

Mathematics

2 answers:

romanna [79]3 years ago

8 0

Step-by-step explanation:

= 32+20-21

= 52-21

= 31

enyata [817]3 years ago

8 0

Answer:

u = x^2

Step-by-step explanation:

on edg 2020

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