$2x \times 3x+2x \times 8-6 \times 3x-6 \times 8$
Calculate the product$6{x}^{2}+2x \times 8-6 \times 3x-6 \times 8$
Calculate the product$6{x}^{2}+16x-6 \times 3x-6 \times 8$
Calculate the product$6{x}^{2}+16x-18x-6 \times 8$
Multiply the numbers$6{x}^{2}+16x-18x-48$
Collect like terms$6{x}^{2}-2x-48$