Answered

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Systems of equations. What are the two solutions with work?

y=x^2-5x-4

y=-2x

Sagot :

Panoyin
y = x² - 5x - 4
y = -2x

  -2x = x² - 5x - 4
+ 5x        + 5x     
   3x = x² - 4
     0 = x² - 3x - 4
     0 = x² - 4x + x - 4
     0 = (x + 1)(x - 4)
     0 = x + 1  or  0 = x - 4
   - 1       - 1     + 4      + 4
    -1 = x             4 = x
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