Need answers with explanation

What is the product? (x2+3y+7) [yy+1)

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2