Question 829671: the height of a rectangle is 6cm shorter than its base the area of the rectangle is 520cm what are the dimensions and can u put the equation to solve it
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
y = x - 6
xy = 520
x(x - 6) = 520
xx - 6x - 520 = 0
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the above quadratic equation is in standard form, with a=1, b=-6, and c=-520
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
1 -6 -520
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 = 26
x = -20
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negative length doesn't fit the problem statement, so use the positive root:
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x = length = 26 cm
y = width = 20 cm
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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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