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Exand and simplify (x-2)^2

When tackling this question you cannot simply multiply what is in the bracket as this this is not fully expanded. First you must rewrite it as (x-2)(x-2). From here we can on expand the brackets by multiplyi...
JS
Answered by Joshua S. • Maths tutor
11541 Views

How do you find the area of a sector of a circle if you know the radius and the angle in the centre?

You find the area of the circle (using radius 2 * π). You divide your angle by 360 (or by 2π). You multiply the 2 answers and you find the area of the sector.
JP
Answered by Jessica P. • Maths tutor
3962 Views

How to solve a quadratic equation without a calculator?

You factorise it. First, you find a common factor between a, b and c. Then, you find the 2 numbers that multiplied give you c and added give you b. If a=1, then the additive inverse of those 2 numbers are th...
JP
Answered by Jessica P. • Maths tutor
10016 Views

Trigonometry Example.

SOH, CAH, TOA explained using an example.
DN
Answered by Dorsa N. • Maths tutor
3851 Views

Solve the equation x^2 - 8x + 5 = 0 by completing the square

x 2 - 8x + 5 = 0 => (x 2 - 8x + 16) - 11 = 0 =>(x - 4) 2 = 11 =>x - 4 = +- sqrt(11) =>x = 4 +- sqrt(11)
DH
Answered by Dom H. • Maths tutor
3938 Views