Transcript Algebra II 4.3, 4.4 PowerPoint Notes

Algebra II
4.3, 4.4: Solve quadratic
equations by factoring
HW: worksheet
Test 4.1-4.4: Friday, Oct. 10th
FOIL
1.) (x + 5)(x – 7)
4.3: Practice A: Factor the expression. If
the expression cannot be factored, say so.
1.) x2 + 4x + 3
2.) x2 – 6x + 8
4.3: Practice A: Factor the expression. If
the expression cannot be factored, say so.
3.) x2 – 15x + 56
4.) x2 – 16
4.3: Practice A: Factor the expression. If
the expression cannot be factored, say so.
5.) 25x2 – 49
6.) 4x2 – 9
Algebra II
4.3, 4.4: Solve quadratic
equations by factoring
HW: none
Test 4.1-4.4: Friday, Oct. 10th
4.4: Practice A: Factor the expression. If
the expression cannot be factored, say so.
2
2
7.) 2x + 5x + 2
8.) 5x + x – 4
4.4: Practice A: Factor the expression. If
the expression cannot be factored, say so.
2
2
9.) 3x – 9x – 12
10.) 27x – 3
4.3, 4.4: Factoring Steps
Factor out a GCF first
 Factor two ( )

– Square root trick or regular factoring.

Solving Equations:
1.) Make equation equal to zero.
2.) Factor
3.) Solve by making each factor equal to zero.
4.4: Practice A: Solve the equation.
11.) 6x2 – 15x – 9 = 0
4.3, 4.4: Practice A: Solve the equation.
2
12.) x – 49 = 0
2
13.) 12x = - 4x + 8
Practice A: Solve the equation.
14.) 2x2 – 4x – 3 = -x2 + 4x
Practice A: Solve the equation.
14.) 2x2 – 4x – 3 = -x2 + 4x
2
15.) x + 7x = 8