Which expression is equivalent to to 7(xy)

Find the roots of the equation below. x^2 - 6 + 9 = 0

If square root x = -7, then x= -49 true or false

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882