Multiply the coefficient.

Multiply the whole bracket by 3a after solving the bracket.

In order to find the product of two polynomials, we must multiply each term in first polynomial by each term in the second polynomial.

Multiply the coefficient.

In order to find the product of two polynomials, we must multiply each term in first polynomial by each term in the second polynomial.

Recall the formula to find the volume of the cube.

Recall the formula to find the area of the rectangle.

In order to find the product of two polynomials, we must multiply each term in first polynomial by each term in the second polynomial.