You can put this solution on YOUR website! Please post each equation as a separate question.
I will factor the first equation.
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15xx + 31x + 2 = 0
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the above quadratic equation is in standard form, with a=15, b=31 and c=2
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
15 31 2
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 = -0.066666666 = -2/30
x = -2
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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