onedirectionfamily onedirectionfamily
  • 22-05-2017
  • Mathematics
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Solve using substitution or elimination.

y=-x²+7
y-2x=4


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MathisLif3
MathisLif3 MathisLif3
  • 22-05-2017
essentially, the solutions will be where the two equations intersect.
y=-x^2+7
y=2x+4

2x+4=-x^2+7.
2x=-x^2+3.
x (x+2)-3=0
quadratic formula=> x=1,-3
(1,6) and (-3,-2) are the solutions to the intercepts
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