Thirty times the square of a non-zero number is equal to 8 times the number. What is the number

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14-07-2017
Mathematics

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Thirty times the square of a non-zero number is equal to 8 times the number. What is the number

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apologiabiology apologiabiology · Answer 1 · 2017-07-14T03:20:45+02:00

apologiabiology apologiabiology

14-07-2017

x is the number
30(x²)=8x
minus 8 both sides
30x²-8x=0
factor out 30x
30x(x-8/30)=0
set each to zero

30x=0
x=0, nope, we said x can't be 0

x-8/30=0
x=8/30
x=4/15

the number is 4/15

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