Search over 10,000 free study notes

Let me show you an example:Complete the square for the following equation....4x²+ 8x - 91) Divide the whole equation by 4, as this is the easiest way to make things simple. It allows us to comp...

His total score is 33+75=108The total marks of the exam is 60+100=160His score as a fraction of the total marks is 108/160To find his percentage score, multiply 108/160 by 100 which is 67.5%

To tackle this question we start by thinking about how many brackets will we need to factorise this equation. As there are three parts to the equation it is most likely we are looking for two brackets. K...

5x² + 2x + 1 = 0, x = -0.2 or -1

Step 1: Remove the most obvious factor, in this case 3x. y = 3x (x² - 4) Step 2: Realize (x² - 4) is the product of two squares and can undergo completing the square to produce ...