Question

The expression below is a sum of cubes. 216x3 +64 true or false?

Answer 1

Since 216 is the cube of 6, 64 is the cube of 4 and x^3 is the cube of x, we have

$216x^3 + 64= (6x)^3+4^3$

so the expression is the sum of the cubes of 6x and 4