Question

2. Розв'яжiть рiвняння: 1) x² = 64; 2) x² = -81; 3) x² = 5; 4) x² = 0; 5) √x = 6; 6)√x=-7. ПОМОГИТЕ!!!

Answer 1

Ответ:

1)8²=64

2)Твердження хибне

3) √5²=5

-√5²=5 (Обидва правильні)

4)0²=0

5)√36=6

6)Твердження хибне

Answer 2

1. x² = 64: x can be either positive or negative square root of 64. x = ±√64 x = ±8

2. x² = -81: The square of any real number is always non-negative. Therefore, there are no real solutions to this equation.

3. x² = 5: x can be either positive or negative square root of 5. x = ±√5

4. x² = 0: The square of any real number is always non-negative. Therefore, the only solution to this equation is x = 0.

5. √x = 6: To solve this equation, we square both sides: (√x)² = 6² x = 36

6. √x = -7: There are no real solutions to this equation since the square root of a number is always non-negative.