Jean says that you can take the square root of each side of an equation. Therefore, she decides that (x - 2)2 + (y + 3)2 = 36 and

(x - 2) + (y + 3) = 6 are equuivalent equations. Marco says that the equations are not equivalent. Who is right? Explain your answer.

Question

Jean says that you can take the square root of each side  of an equation. Therefore, she decides that (x - 2)2 + (y + 3)2 = 36 and

(x - 2) + (y + 3) = 6 are equuivalent  equations. Marco says that the equations are not equivalent. Who is right? Explain your answer.

across · Answer

This is not true. :P

hoblos · Answer

not equivalent

(x - 2) + (y + 3) = 6      if you square both sides you get

(x - 2)^2 + (y + 3)^2 +2(x-2)(y+3) = 36

across · Answer

Take, for example,$$2^2+3^2=4+9=13$$$$2+3=5$$and$$\sqrt{13}\neq5$$