Factoring with a leading coefficient 2x^2+5x+3

Which of the following of the following sets of side lengths could not form a triangle?

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Which of the following is true for the relation f(x)=2x^2+1