arturocarmena10
arturocarmena10 arturocarmena10
  • 09-01-2019
  • Mathematics
contestada

For which actual values of x is it fulfilled that 2x (x - 5) = -(3x + 1) ?

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OmegaAzzy
OmegaAzzy OmegaAzzy
  • 09-01-2019

2x(x - 5) = -(3x + 1)

Distributive property.

2x^2 - 10x = -3x - 1

Move all terms to one side.

Add 3x to both sides, and add 1 to both sides.

2x^2 - 7x + 1 = 0

AC method is not possible, so we will use the quadratic formula.

[tex]\frac{-b +/- \sqrt{b^2 - 4ac} }{2a}[/tex]

7 +/- √49 - 8 / 4

7 +/- √41 / 4

7 +/- 6.40 / 4

(7 + 6.40)/4 = 3.35

(7 - 6.40)/4 = 0.15


The values of x that make the equation true are x = 3.35, and x = 0.15.

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