You don't need to solve for x, I just need to know if this is right. Is 2x^2 + 1x^1 = 3x^3?
(Something tells me that this is wrong, so if you could help me out with this that would be great. And if you could solve and factor the problem
2x2 + x - 21 = 0, that would be awesome because that's what I'm trying to solve.)

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.Exact Form:

2x2 + x - 21 = 0, :

hope this is what you needed, let me know if you have questions!

the answer is d

step-by-step explanation:

a mantle plume is an upwelling of abnormally hot rock within the earth's mantle. as the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of volcanic centers known as hotspots and probably also to have caused flood basalts.

step-by-step explanation: