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10.3 and 4 - *When you put in the square root there are 2...

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10.3/10.4 Finding Square Roots and Solving Quadratic Equations
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Warm Up: Create a list of perfect squares using the numbers 1-25
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Objectives 1) To find square roots 2) To solve quadratic equations using square roots
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Simplify 1) 2) 3) 16 16 9 81
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Radicals A radical (the square root symbol) indicates the positive root. If there is a negative sign in front of the radical, then the expression is looking for the negative square root. 1) 2) 3) 49 - 8 121 ±
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The previous questions differ from questions that say “Find the square root(s)”. Find the square root(s) 1) 900 2) 169 3) -4
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More radical hints
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Unformatted text preview: *****When you put in the square root, there are 2 answers! When the square root is in the problem, there is one answer!!!! Example. Simplify vs. Find the square root(s) of 9 9 Using radicals to solve quadratics Let’s use this to solve quadratic equations in the form . Solving a quadratic, means find the x-intercepts 2 = + + c bx ax 25 2 =-t There are 3 kinds of solutions to a quadratic: Solve using the square root method. 1) 2) 3) 12 12 3 2 = + n 441 2 = b 64 4 2 =-p Homework P526 (#1-3, 5, 6) & P531 (#10-18)...
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