|1. A square root of x2 is denoted by Öx2|
Öx2 = +x or-x.
2. For every x ÎR, x2 ³ 0.
3. Ö-5 and Ö -4 do not exist in the set of real number. Square root of a negative number is called an imaginary number.
4. Square roots of algebraic expressions can be found by three methods, they are
5. If all the terms of an algebraic expression are of the same degree then such an expression is called a homogeneous expression.
6. An algebraic expression f(x,y) is two variables x and y is said to be a symmetric expression if f(x,y) = f(y,x).
7. Equation of the form ax2 + bx + c = where a¹ 0, b and cÎ Z is called a Quadratic Equation.
Directions: Choose the correct answer.