tag:blogger.com,1999:blog-6479061363935732747.post8091182497168985792..comments2016-02-29T11:27:35.947+08:00Comments on 2011 S1-01 Maths Blog: Maths Viva Voce Question 1 Lam JiajunLoh Kwai Yinnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-6479061363935732747.post-9790249182083156962011-10-17T16:25:55.927+08:002011-10-17T16:25:55.927+08:00Part (i): You've clearly pointed out that the ...Part (i): You've clearly pointed out that the 2 opposite lengths are equal because they are in a rectangle. Good. <br />You are right to talk about the moving of the terms. However, I think the subsequent description on how you "move" the terms was a bit messy. Would be good to just focus on the 'balancing of equation', to add or subtract the same term on both sides of the equation.<br />The 'cancellation' of the negative sign is not because value of x must be positive, then we cancel the negative sign. By right, when we reach the step "-x = -3", the next step is to multiply both sides by "-1" so that we can find the "x" value.<br /><br />Part (ii): Should read " cm^2 " as "square centimetre". <br />You are correct to say that we can replace the "x" by the value we found in Part (1). I like the fact that you pointed out we can check the answer if the length value is correct by substituting the x value into the other algebraic expression representing the length.<br /><br />Part (iii): You are right that we must know 1m = 100 cm before we can do the conversion. Good.LOH Kwai Yinhttp://www.blogger.com/profile/06503397685892227762noreply@blogger.com