= 15.Emily is studying the behavior of a function that represents the shape of a particular curve. The function is y (x² - 3)(x² + 1), which describes how the curve rises and falls as x changes. She is particularly interested in the point on the curve where x = 4. At this specific point, she wants to understand the direction the curve is heading. To do this, Emily needs to find the equation of the tangent line to the curve. The tangent line represents the instantaneous slope of the curve at that point. Help Emily by finding the equation of the tangent line to the curve y = point where x =- 4? (x² - 3) (x² + 1) at the