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Question 822283: How do I solve and graph -5x^2 - 20x + 8y + 12= 0
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
-5x^2 - 20x + 8y + 12 = 0
8y = 5x^2 + 20x - 12 = 0
y = (5/8)x^2 + (20/8)x - (12/8) = 0
y = (5/8)x^2 + (5/2)x - (3/2) = 0
y = (0.625)x^2 + (2.5)x - 1.5 = 0
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the above quadratic equation is in standard form, with a=0.625, b=2.5, and c=-1.5
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
0.625 2.5 -1.5
into this solver: https://sooeet.com/math/quadratic-equation-solver.php
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this quadratic has two real roots (the x-intercepts), which are:
x = 0.529822128
x = -4.52982213
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
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