anonymous
  • anonymous
Need help with the middle peice here... P(x) = 4x3 − 5x2 − 5x − 6 expressed in the form (divisor)(quotient) + remainder for the divisor is (x+3)(__?__)+144.
Mathematics
katieb
  • katieb
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amistre64
  • amistre64
How many times does x+3 go into P(x)?
amistre64
  • amistre64
4x^2 -17x+ 46 ----------------------- x+3 | 4x^3 − 5x^2 − 5x − 6 -12x^2 ------------ -17x^2 -5x 51x ---------- 46x -6 -138 --------- -144 either you have a typo or i do
anonymous
  • anonymous
i got the same answer, but i need to fill in the (__?__) spot. I can't figure what i am doing wrong

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amistre64
  • amistre64
(4x^2 -17x+ 46) IS the blank spot, or should be. Since the +144 is on the end there if might mean somthing different; try using wolframalpha.com
anonymous
  • anonymous
i think i know what i did.. i left it as 4x^3 instead of to the 2nd
amistre64
  • amistre64
http://www.wolframalpha.com/input/?i=%284x3+%E2%88%92+5x2+%E2%88%92+5x+%E2%88%92+6%29%2F%28x%2B3%29
amistre64
  • amistre64
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anonymous
  • anonymous
Thanks once again for your help Amistre.. I was making the equation 4x^3 instead of 4x^2 fixed that and got my answer

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