alliemeade alliemeade
  • 10-02-2017
  • Mathematics
contestada

Y=x^2+3x+29 how do you complete the square

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wolf1728
wolf1728 wolf1728
  • 10-02-2017
x^2 +3x +29 = 0
To complete the square:
Move "non-x" term to the right
x^2 +3x  = -29
Divide equation by coefficient of x^2
(the equation already had the x^2 coefficient as 1)
Take coefficient of x
divide it by 2
square it
add it to both sides of equation
3
3/2 = 1.5
1.5^2 = 2.25

x^2 +3x +2.25 = -29 +2.25
Taking square root of both sides
(x +1.5) = sq root( -26.75 )

square roots of negative numbers are complex (I don't know how to do that).



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