If a 5 ft tall woman cast a 2ft long shadow, then how tall is an adult giraffe that cast a 6ft shadow

Mr. walker gave his class the function f(x) = (x + 3)(x + 5). four students made a claim about the function. each student’s claim is below. jeremiah: the y-intercept is at (15, 0). lindsay: the x-intercepts are at (–3, 0) and (5, 0). stephen: the vertex is at (–4, –1). alexis: the midpoint between the x-intercepts is at (4, 0). which student’s claim about the function is correct?

Could somebody me with this radical simplification?

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i