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

What substitution should be used to rewrite 4x4 – 21x2 + 20 = 0 as a quadratic equation?
asked 47.1k views
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What substitution should be used to rewrite 4x4 – 21x2 + 20 = 0 as a quadratic equation?

asked
User Coxer
by
8.6k points

2 Answers

3 votes

35

Explanation:

= 32+20-21

= 52-21

= 31

answered
User Arnaud Nelissen
by
7.8k points
6 votes

Answer:

u = x^2

Explanation:

on edg 2020

answered
User Bamerza
by
8.6k points
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