3.5 Quadratic Equations OBJ:To solve a quadratic equation by factoring.
Lesson 8-2 Problem Solving Objectives Students will: Solve problems by translating to quadratic...
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Transcript of Lesson 8-2 Problem Solving Objectives Students will: Solve problems by translating to quadratic...
Lesson 8-2Problem Solving
ObjectivesStudents will:Solve problems by translating to quadratic equations
Write an equation(s) for the situation and solve.
Example 1
A 400 square feet plot is to be fenced. The perimeter is 100 feet. What are the dimensions of the plot?
l
w400
10022
lw
wl
wl 400
10024002 ww
ww 1002800 2 0)40050(2 2 xw0)40)(10( ww
4010 andwwThe dimensions are 10 ft by 40ft
Example 2
A ladder is 2 feet taller than a wall. When placed at the top of the wall, the base of the ladder is equal to the height of the wall. What is approximate height of the wall in feet rounded to the nearest hundredth?
h
h
2h
222)2( hhh 22 244 hhh
440 2 hh
Now complete the square!!
Assignment
8-2/349/1-12,17-21 odd