Question

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Answer 1

Ответ:

4х² - 25 = 75

4х² = 75 + 25

4х² = 100

х² = 100 ÷ 4

х² = 25

х = -5; 5

х - 9 = 7

х - 9 = -7

х = 7 + 9

х = -7 + 9

х = 16

х = 2

х + 5 = √2

х + 5 = -√2

х = √2 - 5

х = -√2 - 5