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Unit 3 – Quadratic Functions Date: 3.5 Quadratic Function Models: Solving Quadratic Equations
Homework: Page 177-‐178: Questions #1, 2, 4{a,c,d,f}, 6{a,c}, 8, 10, 12, 16, 17 Learning Objectives/Success Criteria: At the end of this lesson I will be able to:
• Find the solutions (zeros or x-‐intercepts) of a quadratic equation using different methods: o Factoring o Quadratic formula
• Express the solutions exactly using radicals or rational numbers or approximately using decimals
Any solution of an equation that does not work in the context of a problem is said to be an inadmissible solution (or not admissible).
1. Three pieces of rod measures 20 cm, 41 cm, and 44 cm. If the same amount is cut off from each piece,
the remaining lengths can be formed into a right triangle. Determine the length that should be cut off for each piece.
2. Find two consecutive whole numbers such that the sum of their squares is 265.
3. The sum of the squares of three consecutive integers is 194. Determine the integers.
4. The sum of two numbers is 24 and the sum of the squares is 306. What are the numbers?
5. What is the equation of a quadratic with the zeros 5 and -‐1 and passing through the point (3,-‐24)?