Review Write the product of the sum and difference. (x + 3) (x – 3) Write the square of the binomial as a trinomial (x + 5)2
10.4 Solve polynomial equations in factored form
Notes Factored form: product of two or more linear factors. Ex: (2x – 3) (x + 5) = 0 Ex: (2x-3)(x+5)(x-7)=0 zero-product property: product of two factors is zero only when at least one of the factors is zero.
Use zero product prop. to solve -T (x + 1) (x + 6) = 0 (c + 7) (c + 2) = 0 (d + 3 4 ) (d + 5 8 )=0 5(m + 4)2 = 0 (t + 4) (t – 4) = 0 (x – 3.2) (x - 3 2 ) = 0
Use zero product prop. to solve -sT (n – 8) (n – 9) = 0 (x + 1 2 ) (x - 1 2 )=0 (x + 9) (x – 8) = 0 (x + 4.2) (x – 4.2) = 0 (x + 5.4) (x – 3) = 0 (y – 6) (y + 6)2 = 0
Solve the equation - t (2x + 8)(x + 7) = 0 (2n – 7)(5n + 20) = 0 (5x + 7)(7x – 15) = 0 (3x + 9.3)(4x – 12.8) = 0
Solve the equation - st (5y – 1)(2y + 4) = 0 (2x – 5)(9x – 15) = 0 (2c + 8)(5c + 10) = 0 (2x - 1 2 )(2x+ 1 2 )2 = 0
Find the x-intercepts and the vertex of the equation. Sketch the graph. Y = (x – 4)(x + 2)
Find the x-intercepts and the vertex of the equation. Sketch the graph. Y = (x + 1)(x - 5)
Wrap up Questions/Comments Hw: text pg. 600, #’s: 20-46 evens, 47, 48, 55, 56