### Other Chapters For 8th

• 8th-class English Chapter 7

When normal people meet disabled people they tend to look sympathetic and give advice to have...
• 8th-class English Chapter 8

The monsoon enters India from east and south somewhere around mid of May. It reaches northern...
• 8th-class English Chapter 6

Jody's father was bitten by a rattle snake, A doe was killed to save his life, fawn is left...
• 8th-class English Chapter 9

The Great Stone Face, then, was a work of Nature in her mood of majestic playfulness, formed on...
• 8th-class English Chapter 5

'The Summit Within' is a story of experiences of Major H.P.S. Ahluwalia, a member of the first...
• 8th-class English Chapter 4

1. Why did the man stare at Bepin Babu in disbelief?Ans: As per the man, he had met Bepin Babu...
• 8th-class English Chapter 10

There was a hill near the village. Seen from a distance it resembled a human face. People...
• 8th-class English Chapter 3

During 18th century, British east India Company was extending its power in worldwide. That time...
• 8th-class English Chapter 2

In tsunami Ignesious , the manager of a cooperative society, lost two of his children, wife and...
• 8th-class English Chapter 1

No one wants war to happen. Nobody likes war. Soldiers too are human beings and do not want...

# 8th Class Chapter No 6 - Squares & Square Roots in Maths for CBSE NCERT

In mathematics, a square root of a number a is a number y such that y2 = a; in other words, a number y whose square (the result of multiplying the number by itself, or y⋅y) is a. For example, 4 and −4 are square roots of 16 because 42 = (−4)2 = 16. Every nonnegative real number a has a unique nonnegative square root, called the principal square root, which is denoted by √a, where √ is called the radical sign or radix. For example, the principal square root of 9 is 3, which is denoted by √9 = 3, because 32 = 3 • 3 = 9 and 3 is nonnegative. The term (or number) whose square root is being considered is known as the radicand. The radicand is the number or expression underneath the radical sign, in this example 9. Every positive number a has two square roots: √a, which is positive, and −√a, which is negative. Together, these two roots are denoted as ± √a (see ± shorthand). Although the principal square root of a positive number is only one of its two square roots, the designation "the square root" is often used to refer to the principal square root. For positive a, the principal square root can also be written in exponent notation, as a1/2. Square roots of negative numbers can be discussed within the framework of complex numbers. More generally, square roots can be considered in any context in which a notion of "squaring" of some mathematical objects is defined (including algebras of matrices, endomorphism rings, etc.)
Posted in 8th on February 13 2019 at 03:29 PM

### CBSE NCERT 8th CLASS Maths OTHER CHAPTERS

• 8th-class Maths Chapter 15

Graphical presentation of data is easier to understand.(i) A bar graph  is used to show...
• 8th-class Maths Chapter 14

In mathematics, factorization (also factorisation in some forms of British English) or factoring...
• 8th-class Maths Chapter 13

In mathematics, two variables are proportional if there is always a constant ratio between them....
• 8th-class Maths Chapter 11

Measurement is the assignment of a number to a characteristic of an object or event, which can...
• 8th-class Maths Chapter 10

A shape is the form of an object or its external boundary, outline, or external surface, as...
• 8th-class Maths Chapter 9

In mathematics, an algebraic expression is an expression built up from integer constants,...
• 8th-class Maths Chapter 8

Comparing Quantities. A ratio is a comparison between two or more like quantitiesin the same...
• 8th-class Maths Chapter 7

In mathematics, a cube root of a number x is a number y such that y3 = x. All real numbers...
• 8th-class Maths Chapter 5

Data handling is one of the central activities in which real mathematicians engage: they are...
• 8th-class Maths Chapter 4

Geometry (from the Ancient Greek: γεωμετρία; geo- "earth", -metron "measurement") is a branch of...