Find the volume round to nearest tenth i necessary

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Two sides of a right triangle measure 2 units and 4 units. what is the area of the square that shares a side with the third side of the triangle?