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x^2 + 6x + 8

Factorising Quadratics, double bracketsWe want two numbers that multiply to give 8 and add to give 6. Lets list the factors of 8: 1, 2, 4, 8From the list of of numbers above, which 2 can add to give +6?2 ...

Answered by Maariya A. • Maths tutor

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What is the purpose of RAM in a computer?

RAM (Random Access Memory) is a form of memory which is used to save data about programs that are currently open. RAM is much faster than a HDD or SSD, and so the CPU has to spend less time in the "f...

Answered by Jack G. • Computing tutor

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Solve the simultaneous equations : x^2 + y^2 = 13 and x = y - 5 .

Below is the solution to the aforementioned question. In order to solve a simultaneous equation, one has to write one of the unkown variables in terms of the other. In this case, x was already written in ...

Answered by Sebastian G. • Maths tutor

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a) A line passes through (0,9) and (3,12) write down the equation of this line . b) A line perpendicular to the line in part a passes through the point (3,14) write the equation of this line.)

a) The gradient of a line is given by the equation (change in y)/(change in x). Therefore to find the gradient of the line in part a we must do (12-9)/(3-0) = 1. Now we have the gradient we can use the fo...

Answered by Rohil P. • Maths tutor

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Simplify 125^(-2/3)

Simplify 125^-2/3
A negative indices means that we need to reciprocate the number or "flip it":
125^-2/3 = (1/125)^2/3
A fractional indices can be sp...

Answered by Bethan H. • Maths tutor

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