6.4: Solving Polynomial Equations
Solving by Graphing 1. 3x 3 – 6x 2 – 9x =0 2. 6x 2 = 48x
3. 2x 3 + 5x 2 = 7x 4. 12x 3 = 60x x
The volume V of a container is modeled by the function V(x) = x 3 – 3x 2 – 4x. Let x, x + 1, and x – 4 represent the width, the length, and the height respectively. The container has a volume of 70ft 3. Find the container’s dimensions.
Sum of Cubes (a 3 + b 3 ) = (a + b)(a 2 – ab + b 2 ) Difference of Cubes (a 3 – b 3 ) = (a – b)(a 2 + ab + b 2 )
Factor each expression. 1. x x 3 – 1
Solve each equation x = 0 2. x 3 – 27 = 0
Factor each expression. 1. x 4 – 8x x 4 – 6x x 4 – 7x
Solve each equation. 1. x 4 – 10x = 0 2. x 4 – 12x 2 – 64 = 0 3. x 4 + 7x 2 – 18 = 0
Solve each equation. 1. x 3 + 2x 2 + x +2 = x 3 + 3x x + 21 = x 3 – 6x 2 + x – 3 = 0
S olve each equation x 3 – 192 = x x 2 = x 5 – 5x 3 + 4x = x 4 – 14x x 2 = 0