Respuesta :

Step-by-step explanation:

Step by Step Solution

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STEP

1

:

Equation at the end of step 1

(((7 • (x3)) + 2x2) - 21x) - 6

STEP

2

:

Equation at the end of step

2

:

((7x3 + 2x2) - 21x) - 6

STEP

3

:

Checking for a perfect cube

3.1 7x3+2x2-21x-6 is not a perfect