radicals review
DESCRIPTION
Radicals Review. Parts. Radical Sign. Radicand – the number underneath the radical sign. Coefficient. Radical. Pronounced: 2 times the square root of 7 OR 2 radical 7. Simplest Radical Form. When you cannot factor any more perfect squares from the radicand - PowerPoint PPT PresentationTRANSCRIPT
Radicals Review
Parts
72 Coefficient
Radical Sign
Radicand – the number underneath the radical
sign
RadicalPronounced: 2 times the square root of 7 OR
2 radical 7
Simplest Radical Form When you cannot factor any more
perfect squares from the radicand The radical cannot be simplified further
We always want our answers to be in simplest radical form
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Getting Radicals into Simplest Radical Form
Steps1. Look for the largest perfect square that’s a factor of the radicand.
Getting Radicals into Simplest Radical Form
Steps2. Factor using the perfect square as one of the factors.
Getting Radicals into Simplest Radical Form
Steps3. Take the square root of the factor that’s a perfect square.
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Getting Radicals into Simplest Radical Form
Steps4. Write the square root as the factor in front of the radical and leave the other factor under the radical.
Getting Radicals into Simplest Radical Form
Steps5. If there’s a number in front of the radical, multiply the square root by it.
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Examples 72
Examples 443
Examples 1126
Your Turn: Write problems 1 – 8 in simplest
radical form.
Multiplying Radicals Multiply like parts
coefficients * coefficients radicand * radicand
Simplify the radical if necessary
Examples 615
Examples 25142
Examples 23325
9. 10.
11. 12.
Your Turn:
Seek and Solve!!!
What is rationalizing? The process of algebraically
removing a radical sign from one part of a fraction
We generally rationalize the denominator (But we can rationalize the numerator.)
Why rationalize? The result is easier
to estimate and understand
Also shows up in solving limits (in calculus) 2
221
MonomialAn expression with exactly one term
Examples: 3x –7x3
Non-Examples: 7x – 4 4y2 – 16y + 60