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Equation : find values

  • Thread starter DeanBH
  • Start date
  • #1
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2x^2 − 12x + p = q(x − r)^2 + 10 for all values of x find p q and r

i've got

2(x-3)^2 + p = Q(x-r)^2 + 10

so q = 2 r = 3 and p = 10?

now the answers say that Q = 2 r = 3 and p = 28?

can someone explain how to properly go about doing this equation.
 

Answers and Replies

  • #2
454
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2x^2 − 12x is not the same as 2(x-3)^2
 
  • #3
HallsofIvy
Science Advisor
Homework Helper
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If a polynomial equation is true for all values of x, then "corresponding coefficients"- that is, coefficients multiplying the same powers of x on opposite sides of the equation- must be the same: multiply the square on the right and compare "corresponding coefficients".
 
  • #4
82
0
2x^2 − 12x is not the same as 2(x-3)^2


k ive done it now, thx
 

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