ACE, GENIUS, TRUSTED HELPERS!!!!!If x = 2a − b^2 , which expression represents a? SHOW YOUR WORK!!! I already know the answer, I just need help with the work. i am crying right now because no one is answering my questions correctly. people are putting wrong answers or are putting right answers without work. It really isn't nice. A. X + B^2B. (B^2 - x)/2C. (X + B^2)/2D. (x - b^2)/2Please show work!!!I beg of you!
Accepted Solution
A:
Selection C is appropriate.
_____ Whenever you solve for something, consider what operations are done to that something. Undo them in reverse order.
Here, "a" is • multiplied by 2 • has -b^2 added
The last operation is adding -b^2, so we undo that first. We undo it by adding its opposite, b^2. .. x +b^2 = 2a -b^2 +b^2 .. x +b^2 = 2a . . . . . . . . . . . the point is to cancel the -b^2 term on the right.
The operation before that is multiplying "a" by "2". We undo that by multiplying by the reciprocal of 2, which is 1/2. .. (1/2)*(x +b^2) = (1/2)*2a .. (x +b^2)/2 = a . . . . . . . . . the point is to cancel the multiplication by 2 on the right.