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60)

a. x² - 5x = 0

x (x - 5) = 0

b. 6x² - 18x = 0

6x (x - 3) = 0

61)

a. x² - 4 = 0

(x - 2) (x + 2) = 0

b. x² - 6x + 9

(x - 3)² = 0

62)

a. 4x² - 1 = 0

(2x - 1) (2x + 1) = 0

b. (x - 3)² - 4 = 0

(x - 3 - 2) (x - 3 + 2) = 0

(x - 5) (x - 1) = 0

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