Square roots

(including old symbols and problems in solving radical

expressions)

What is Square Root?

OFor any given number, it is another number that when

multiplied by itself equals the given number.

Symbol Origin Author

R 1436-1476 Regiomontanus

√ 1525 Christoff Rudolff

n√ 1629 Albert Girard

Symbol Origin Author

√ � 1637 René Descartes

· 1698 Gottfried Leibniz

∏ 1812 Carl Friedrich Gauss

Symbol Origin Author

x 1902 J. Willard Gibbs

ℤ 1930 Edmund Landau

Word Problem!O Ms. Sharon grouped the grade 9

into two groups and the first group includes Julius, Jansen, Ella

and Rose Ann and they were assigned to cut a square-shaped cardboard box. Find the length of the sides of a square whose area

is √72 square centimeters.

Solution!A = S2

72 = S2

√72 = √S2

√9•8 = √S2

3 √8 = S6 √2=S

Thanks for listening!

Prepared by: Julius :)