Week 3 – Absolute Value, Roots

This week we learned some new concepts and reviewed concepts from grade 10.

2.1 Absolute Value – The principal square root of the square root of a number.

ex. $\mid{-7}\mid$ absolute value = 7

the absolute value is the amount that the given number is different from 0.

Note – The radicand can only be positive

$\mid{7-16}\mid$

7 – 16 = -23

absolute value = 23

-23 & 23, are both 23 digits away from 0.

2.2 Roots and Radicals

Perfect Squares 4,9,16,25,36,49,64,81,100

Perfect Cubes 8,27,64,125

Simplify

$\sqrt [3]{40}$

= $\sqrt[3]{8\cdot5}$

= $2\sqrt[3]{5}$

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