Just need help with number 1. Thanks!
2 answers:
For 1 you can use 2 or -4, either one works.
Answer:512/27
Step-by-step explanation:
10x^2+20x-71=9
30x^3=9+71
30x^3=80
x^3=80/30
x^3=8/3
x=8^3/3^3
x=512/27
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