Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.16.2 Solving Inequalities - Quadratic What is a quadratic inequality? An?Inequality?tells you that one expression is greater than (“>”) or less than (“<”) anoth...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.16.1 Solving Inequalities - Linear What is a linear inequality? An?Inequality?tells you that one expression is greater than (“>”) or less than (“<”) another “?”...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.15.1 Quadratic Simultaneous Equations What are quadratic simultaneous equations? When there are two unknowns (say x and y) in a problem, we need two equations to be a...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.14.1 Quadratic Formula What is a quadratic equation? A quadratic equation looks like (or can/should be made to look like) this:ax2?+ bx + c = 0 (as long as a ≠ 0) &nb...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.13.1 Linear Simultaneous Equations What are linear simultaneous equations? When there are two unknowns (say x?and?y) in a problem, we need two equations to be able to...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.12.1 Direct & Inverse Proportion What is proportion? Proportion?is a way of talking about how two?variables?are related to each other Direct?proportion: as one va...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.11.2 Solving Linear Equations Solving equations… … is just like rearranging formula so we’ll use exactly the same method … GROF GROBLET FIND ANSWER! This is a mnemoni...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.11.1 Collecting Like Terms Collecting like terms Expand brackets first! TERMS are separated by + or – “LIKE” terms must have exactly the same LETTER bit (the NUMBER b...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.10.1 Equations & Problem Solving What is problem solving? Problem solving in mathematics involves using several stages, across a variety of topics, to answer a qu...
