(x – 8) (x + 8) = 0 x – 8 = 0 x + 8 = 0 + 8 - 8 x = 8 x = - 8 10 7 52 (x + 5) (x + 2) = 0 x + 5 = 0 x + 2 = 0 - 5 - 2 x = - 5 x = - 2.

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Presentation transcript:

(x – 8) (x + 8) = 0 x – 8 = 0 x + 8 = x = 8 x = (x + 5) (x + 2) = 0 x + 5 = 0 x + 2 = x = - 5 x = - 2

(5x + 3) (x + 1) = 0 5x + 3 = 0 x + 1 = x = - 3 x = x x 55 x = - 3 / (2)c 2(2) (10) 2 - 4(2)(4)

- 10 2(2) (10) 2 - 4(2)(4) √ ± x = √ ± √ ± √ x = ±

+ 8 x 2 + 6x = 8 (x + 3) 2 = x x2x2 +9 x+ 3 x √√ - 3 x + 3 = ± 17 √ x = - 3 ± 17 √

+ 8 x 2 + 6x = 8 (x + 3) 2 = x x2x2 +9 x+ 3 x √√ x + 3 = ± 17 √ + 20 x 2 = 20 x = ± 20 x = ± 2 5 √ √√ √

+ 20 x 2 = 20 x = ± 20 x = ± 2 5 √ √√ √ √√ x – 5 = 9 x – 5 = x = 14 x = - 4