5.1 Square and square roots

Square and square roots

To square is to raise the number to the second power. In other words, to square is to multiply the number by itself. Square root is the inverse operation of squaring. To square root is to find the two identical factors of a number.

Lessons

Notes:
To square:
Raise the number to the second power
Ex: 52 {5^2} = 5×5=25 5\times 5 = 25
82 {8^2} = 8×8=648\times 8 = 64

To square root:
Finding the two identical factors
Ex: 16 \sqrt{16} = 4×4 \sqrt{4\times 4} = 4
49 \sqrt{49} = 7×7 \sqrt{7\times 7} = 7

Perfect squares numbers:
02 {0^2} = 0
12 {1^2} = 1
22 {2^2} = 4
32 {3^2} = 9
42 {4^2} = 16
52 {5^2} = 25
62 {6^2} = 36
72 {7^2} = 49
82 {8^2} = 64
92 {9^2} = 81
& so on... {100, 121, 144, 169, 196...}

  • 1.
    Understanding the negative square roots of the following
  • 2.
    Find the square roots
Teacher pug

Square and square roots

Don't just watch, practice makes perfect.

We have over 4190 practice questions in College Algebra for you to master.