SOLUTION: Without solving the equation or factoring, determine the solution(s) to the equation, x2 + 4x − 5 = 0 , using only the graph

Algebra ->  Graphs -> SOLUTION: Without solving the equation or factoring, determine the solution(s) to the equation, x2 + 4x − 5 = 0 , using only the graph      Log On


   

Question 560958: Without solving the equation or factoring, determine the solution(s) to the
equation, x2 + 4x − 5 = 0 , using only the graph
Found 2 solutions by stanbon, josmiceli:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Without solving the equation or factoring, determine the solution(s) to the
equation, x^2 + 4x − 5 = 0 , using only the graph
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graph%28400%2C400%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B4x-5%29
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x = -5 or x = 1
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Cheers,
Stan H.
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Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+x%5E2+%2B+4x+-+5+=+0+
Here's the plot:
+graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+10%2C+x%5E2+%2B+4x+-+5%29+
It looks like the roots are
+x+=+1+ and
+x+=+-5+
check answers:
Rewrite these as:
+x+-+1+=+0+
+x+%2B+5+=+0+
Multiplying:
+%28+x+-+1+%29%2A%28+x+%2B+5+%29+=+x%5E2+-+x+%2B+5x+-+5+
+%28+x+-+1+%29%2A%28+x+%2B+5+%29+=+x%5E2+%2B+4x+-+5+
OK