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If you take £28, what is 10% of 28? 2.8 So what is 30% of 28? You would do 2.8 x 3... which is? 8.4 And what is 5% of 28? You would half 2.8...so 1.4 Now add together 30% of 28 and 5% of 28... this gives 9.8...

To solve this equation we need to firast expand it. x 2 =4(x-3) 2 To do this we first expand the brackets. Remeber anything squared means times it by itself (x-3) 2 =(x-3)(x-3) =x 2 -6x+9 This makes the equa...

All quadratic equations have the form ax 2 + bx + c. If you take the equation: 2x 2 + 4x + 2 In this example a=2, b=3 and c=2 In order to factorise what we call a number (coefficient) higher than 1 in front ...

To simplify this fraction, you must rationalise the denominator (lower half of the fraction) to get rid of the surd. A surd is an irrational number that cannot be simplified further to remove the square root...

So we are solving to find x. Our first step is to make sure everything is written in whole numbers (we need to get rid of that fraction). To do this we multiply both sides of the equation by 2, we have to mu...