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Maths
GCSE

Expand (x+3)(2x+9)

(In terms of formatting, we'll use little x "x" to mean the algebraic variable, and big x "X" to mean multiply). When we see two sets of brackets written next to each other, such as (....

Answered by Luke B. Maths tutor
7924 Views

How to find an original price from a reduced percentage.

Take the example: 'The price of a TV is reduced to 69% and is now £379.50. Find the original price. (This means find the price when it was at 100%.) Let's start by calling each percentage a 'part'. The ne...

Answered by Phoebe E. Maths tutor
10573 Views

What is a coordinate?

It is a point on a graph described by its numerical values. For example (2,3) would be 2 along the x-axis and 3 along the y-axis.

Answered by Edward S. Maths tutor
3379 Views

What does Pythagoras's theorem state?

It states that for a right-angle triangle, the square of the hypotenuse equals the sum of the squares of the other sides. So if a denotes the hypotenuse, a^2 = b^2 + c^2.

Answered by Rohan V. Maths tutor
4113 Views

How do you factorise a quadratic? Something like x^2 + 4x + 3

When factorising a quadratic the idea is to separate it into two brackets, so first, I usually write out the empty brackets like this; (x___)(x___) You then need to think of numbers that you can put in th...

Answered by Jordan A. Maths tutor
2926 Views

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