# roots

 Powers of Two 21 22 23... 210 cubes 13 23... 103 Squares 112 122 252 decimal values of square roots 24= 16 25 = 32 26= 64 27= 128 28= 256 29 = 512 210= 1024 112= 121 122= 144 132= 169 142= 196 152= 225 162= 256 172= 289 182 = 324 192 = 361 202 = 400 252 625 23 8 33 = 27 43 = 64 53 = 125 63 = 216 73 = 343 83 = 512 93 = 729 103 = 1,000 Approximating Roots – To approximate the value of a root, find the squares that it lies between andesti␣mate. Simplifying Square Roots – To simplify any square root, rewrite the root as a product of its factors inside the radical and simplify any pairs that lie within. How to simplify complex routes To simplify complex square roots, the terms within the radical must be combined! Factoring Complex Square Roots – Complex square roots can often be simplified by factoring out terms in common to both terms within the radical. Adding and Subtracting Square Roots – Terms that contain the same radical can be added or subtracted. Multiplying Square Roots – To multiply square roots, combine the terms under a single radical and multiply. Dividing Square Roots – To divide square roots, break down the radicals, cancel out like terms, and simplify. Radicals in the Denominator – Radicals cannot be left in the denominator of a fraction. • To rectify the situation, multiply the top and bottom of the fraction by the square root that appears inthe denominator. Conjugates – Denominators that contain the sum or difference of a square root and another term cannot be simplified by the technique demonstrated above .• To simplify an expression such as7, it must be multiplied by the conjugate of its denominator. 5−3(1) Put another way, the conjugate of an expression is formed by changing its sign. T Mathematically, the difficulty of conjugating can be reduced by factoring the difference between perfectsquares: Roots As Exponents – All roots can be expressed as fractioned exponents. • Recall that numbers with fractioned exponents can be expressed as roots. The denominator of the exponent determines the root of the base and the numerator determines what power to raise this root to. The Square Root of a Decimal – There are two ways to take the square root of a decimal. What Squared Equals the Square Root?• In most instances, the easiest way to take the square root of decimal is to ask yourself “what times what would equal the square root?” Authorkaytea1112 ID26047 Card Setroots Descriptioncharts of roots Updated2010-07-09T16:26:15Z Show Answers