Answer:
see explanation
Step-by-step explanation:
Let u = x² ( choice of variable is flexible ), then
4u² - 21u + 20 = 0 ← expressed as a quadratic
This can now be solved for u and converted back into terms of x
Show how you did it step by step?
Answer:
It should be C
Step-by-step explanation:
You want to cancel out the x variables
