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Learn about the square root symbol (the principal root) and what it means to find a square root. Also learn how to solve simple square root equations.

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The video explores the intriguing concept of imaginary numbers, specifically the imaginary unit 'i'. 'i' is equal to the square root of -1, and every complex number can be expressed as a + bi, …

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Algebra 1 Course: Algebra 1 > Unit 13 Lesson 8: Factoring quadratics with perfect squares

Factor quadratic expressions of the general perfect square forms: (ax)²+2abx+b² or (ax)²-2abx+b². The factored expressions have the general forms (ax+b)² or (ax-b)².

Learn how to factor quadratics that have the "perfect square" form. For example, write x²+6x+9 as (x+3)².

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First we simplify the radical expressions by removing all factors that are perfect squares from inside the radicals. Then we can see whether we can combine terms or not.