( 12.43×12.43×12.43 +19.57×19.57×19.57) / (12.43×12.43-12.43×19.57 +19.57×19.57)
Let a = 12.43 and b = 19.57. So, (a3+b3) / (a2-ab+b2) As we know that - a3+b3 = (a+b) (a2-ab+b2). =(a+b) (a2-ab+b2) / (a2-ab+b2). The term (a2-ab+b2) cancel out and leave- =(a+b) =12.43+19.57 =32.
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