Question

12[x2+7]2 -8[x2+7][2x-1]-15[2 x-1]2

Answer 1

12[2+7]2−8[2+7][2−1]−15[2−1]2

12[x^2+7]2 -8[x^2+7][2x-1]-15[2 x-1]212[x2+7]2−8[x2+7][2x−1]−15[2x−1]2