<PRE><B>Question 828414</B>
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4x^2 - 21x - 18 =0
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the above quadratic equation is in standard form, with a=4, b=-21, and c=-18
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
4 -21 -18
into this solver: https://sooeet.com/math/quadratic-equation-solver.php
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the quadratic has two real roots at:
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x = 6
x = -0.75
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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</PRE>