(Yes, this means that you can use your graphing calculator to help you check your work.) When I was solving " lines had not intersected.
(Yes, this means that you can use your graphing calculator to help you check your work.) When I was solving " lines had not intersected.Tags: Essay On Effects Of Global WarmingWhat Is Argumentative EssaySickle Cell Research PaperWhat Do Essays Look LikeProblem Solving Skills GamesControversial Issues Write Research PaperGames For Problem Solving SkillsCreative Writing Reading ListPaths To War New EssaysThesis For Pro Life Speech
A "radical" equation is an equation in which at least one variable expression is stuck inside a radical, usually a square root. If the instructions don't tell you that you must check your answers, check them anyway.At the very least, compare your solution with a graph on your graphing calculator.On the left-hand side of this equation, I have a square root. On the right-hand side, I've got a positive number.Since both sides are known positive, squaring won't introduce extraneous solutions.Warning: Many instructors do not to show many examples (in class or in the homework) of radical equations for which the solutions don't actually work.But then they'll put one or more of these on the next test.And the best way to get rid of the 3 is to subtract 3 from the left-hand side.And of course, if I do it on the left-hand side I also have to do it on the right-hand side.When you do this-- when you square this, you get 5x plus 6. So we get x is equal to 15, but we need to make sure that this actually works for our original equation. And this is the principal root of 81 so it's positive 9.If you square the square root of 5x plus 6, you're going to get 5x plus 6. On the left-hand side, we have 5x and on the right-hand side, we have 75. We get x is equal to-- let's see, it's 15, right? Maybe this would have worked if this was the negative square root. So it's 3 plus 9 needs to be equal to 12, which is absolutely true.