 # 4.3, 4.4: Solve quadratic equations by factoring

## Presentation on theme: "4.3, 4.4: Solve quadratic equations by factoring"— Presentation transcript:

4.3, 4.4: Solve quadratic equations by factoring
Algebra II 4.3, 4.4: Solve quadratic equations by factoring HW: worksheet Test : Friday, Oct. 10th

FOIL 1.) (x + 5)(x – 7)

4. 3: Practice A: Factor the expression
4.3: Practice A: Factor the expression. If the expression cannot be factored, say so. 1.) x2 + 4x ) x2 – 6x + 8

4. 3: Practice A: Factor the expression
4.3: Practice A: Factor the expression. If the expression cannot be factored, say so. 3.) x2 – 15x ) x2 – 16

4. 3: Practice A: Factor the expression
4.3: Practice A: Factor the expression. If the expression cannot be factored, say so. 5.) 25x2 – ) 4x2 – 9

4.3, 4.4: Solve quadratic equations by factoring
Algebra II 4.3, 4.4: Solve quadratic equations by factoring HW: none Test : Friday, Oct. 10th

4. 4: Practice A: Factor the expression
4.4: Practice A: Factor the expression. If the expression cannot be factored, say so. 7.) 2x2 + 5x ) 5x2 + x – 4

4. 4: Practice A: Factor the expression
4.4: Practice A: Factor the expression. If the expression cannot be factored, say so. 9.) 3x2 – 9x – ) 27x2 – 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.
12.) x2 – 49 = 0 13.) 12x2 = - 4x + 8

Practice A: Solve the equation.
14.) 2x2 – 4x – 3 = -x2 + 4x

Practice A: Solve the equation.
14.) 2x2 – 4x – 3 = -x2 + 4x 15.) x2 + 7x = 8