12. Correct. The answer is false. d/dx[f(x)/g(x)] = [f'(x)*g(x)- f(x)*g'(x)]/[g(x)]². d/dx[ax²/(bx+c)] = [2ax (bx + c) - 2abx]/(bx + c)² = [abx² + 2 acx] /(bx + c)² = ax(bx + 2c)/(bx + c)²