<p>A solid rectangular block has a square base of side $x$ cm and height of $y$ cm.  The total surface area of the rectangular block is $90$cm2 and the total length of the $12$ edges is $48$cm.  Show that ${{x}^{2}}-8x+15=0$ and find the possible values of $x$ and of $y$.</p>

A solid rectangular block has a square base of side $x$ cm and height of $y$ cm.  The total surface area of the rectangular block is $90$cm2 and the total length of the $12$ edges is $48$cm.  Show that ${{x}^{2}}-8x+15=0$ and find the possible values of $x$ and of $y$.

Polynomials, Cubic Equations and Partial Fractions - Linear and Non-Linear Simultaneous Equations

Question 1355676c

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