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Countdown to Exams - Day 82 - Vectors

Countdown to Exams - Day 82 - Vectors

Today's topic in the countdown to exams is Vectors. Vectors describe a translation (a movement from one place to another) and can be written using vector notation (used to describe a translation). as we get more advanced, the coordinate grid is removed and the notation is given by bold letters (ab, c) To go from one point to another, you will have to travel along vectors that you already know. If you travel with a vector it will be positive, if you travel against a vector, it will be negative.

In more advanced questions midpoints and ratios will be introduced and you may have to factorise your answers to prove that two vectors are parallel or collinear.

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Countdown to Exams - Day 63 - Solving by factorising and the Quadratic formula

Countdown to Exams - Day 63 - Solving by factorising and the Quadratic formula

In today's blog, we take a look at solving quadratics using two methods. The first method to explore is solving by factorising. This means that we need to put the quadratic into double brackets and then solve to find values for x. If you end up with a quadratic that cannot be factorised then you will need to use the Quadratic formula method.

It is important to establish the values of a, b and c that are needed to substitute into the formula. You will need to memorise the formula as you will not be given this in the exam. Remember that when using the quadratic formula, you will need to do two calculations one where you ADD the square root and one where you SUBTRACT the square root. 

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Countdown to Exams - Day 15 - Factorising Quadratics

Countdown to Exams - Day 15 - Factorising Quadratics

In today's revision countdown, we are taking a look at Factorising Quadratics. Remember, factorising is putting into brackets! It is important to remember the general structure of a quadratic as you may need to rearrange your expression/equation to create the general structure.

We start off by looking at simple quadratic expressions where the a value is equal to one. The key point to remember here is the 'Sum and Product rule' We finish off by looking to factorise quadratics where the a value is not equal to 1.

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Countdown to Exams - Day 13 - Factorising

Countdown to Exams - Day 13 - Factorising

Surprise Surprise! Today we are focusing on the inverse of expanding, Factorising. Whenever you see this in a question, it means that you have to write the expression with brackets.

Here we take a look at how to factorise expressions by factoring out common factors (by dividing). We take you through two possible methods to do this.

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