anonymous
  • anonymous
2x^3-30x^2+108x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Hero
  • Hero
Please give explanations and steps, not just answers.
Hero
  • Hero
New Hint: factor out 2x first
anonymous
  • anonymous
aright well i cant find the numbers to add and to multiply and get the same thing

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radar
  • radar
After factoring out the 2x what do you have left to factor further?
radar
  • radar
2x( ---------------)?
anonymous
  • anonymous
15 and 54
radar
  • radar
2x(x^2-15x+54) Now notice that the sign of the 54 is positive, but the sign of the 15 is negative. This tells us that both factors of the 54 will be negative and they will combine to form a -15, can you think of two numbers when multiplied equal 54 and when added equal 15???
radar
  • radar
We know they will be negative, but we don't know what the numbers are? But you can figure it out.
anonymous
  • anonymous
5 and 18
radar
  • radar
5 times 18 = 90 5 + 18 =23 Not even close, you can do better.
radar
  • radar
a*b=54 a+b=15 mystery!
Hero
  • Hero
Hint 9*6 =54
anonymous
  • anonymous
9and6
anonymous
  • anonymous
yeah got it!
radar
  • radar
Don't forget to use correct signs!
Hero
  • Hero
I gave that hint earlier
anonymous
  • anonymous
thanks
radar
  • radar
Yes, I think he has got the complete solution now. Thanks for the assist.
Hero
  • Hero
2x^3-30x^2+108x 2x(x^2 - 15x + 54) 2x(x^2 - 9x - 6x + 54) We're not done just yet are we?

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