Search over 10,000 free study notes

To factorize this you need to find two numbers that have a sum of -1 and a product of -12. Start y finding the pairs of numbers the times to make -12; (-1,12), (-2,6), (-3,4), (1,-12), (3,-4), (2,-6). Nex...

The three trigonometric functions sine, cosine, and tangent are derived from looking at the ratios of side lengths in a right-angled triangle. (Triangle drawn and side lengths annotated H=hypotenuse, A=ad...

Firstly I check that the equation is of the form ax² +bx+c=0 , here it is in such form as a=3 b=-1 c=-10. Because it is a quadratic equation, it can be factorised into 2 brackets. In each brack...

Quadratic equations have a variable usually the letter x (but it could be any letter or symbol in theory).The value of x is unknown but you can work it out after following a few simple steps. Here is an e...

Find two numbers that multiply to give 2 and add together to give 3: 1 and 2
Factorise: (x+2)(x+1)=0
The solutions are x= -2 and x= -1
Explanation: Brackets means you multiply, this means t...