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

User Coxer
by
7.7k points

2 Answers

3 votes

35

Explanation:

= 32+20-21

= 52-21

= 31

User Arnaud Nelissen
by
6.7k points
6 votes

Answer:

u = x^2

Explanation:

on edg 2020

User Bamerza
by
7.7k points
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