Notes

A surd can be described as a root whose exact value cannot be found. It is an example of an irrational number; a number which cannot be expressed in the form: In getting the value of a surd, the decimal…

Expansion of Algebraic Expressions Earlier, you read that: a(b + c) = ab + ac Example 1 Expand (2x – 3)(3x + 4) = 2x(3x + 4) – 3(3x + 4)= 6x2 + 8x – 9x -12= 6x2 – x – 12…

A square is the result of multiplying a number by itself. Squares by Multiplication Find the Square of  a)  3 , b)  14 , c) 245 a) 32 = 3 x 3 = 9b) 142 = 14 x 14 = 196c) 2452 = 245 x 245…

A decimal is a fraction whose denominator is a power of 10. Express as decimal a) Express the following fraction as a decimal     ⅜ Express decimals as fractions a) Express the following decimal as a fraction     0.355 b) Express the…

Addition and Subtraction It should be noted that:a) + –  =  –b) – +  =  –c) – –  =  +d) + +  =  + As a student, please try: ( For this questions, please draw a number line as the one shown above from -14 to +14 )i) 4 + 8ii) -4 + 8iii)…

When two numbers are multiplied to get a third number, the two numbers are factors.Consider: a x b = c ,    a and b are factors of c. c is referred to as the Multiple.A composite number is a number with more than two factors. Factors of Composite numbers a) Write…