if p=2-a then prove that a^3+60p+p^3-8=0.
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a^3+60p+p^3-8=0
a^3+60 (2-a)+(2-a)^3-8=0
a^3+120-60a+8-a^3-8=0
120-60a=0
-60a=-120
a=2
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