Question

1) x^2=81. 2) x^2=100. 3) x^2=0,25. 4) x^2=0,04. 5) 4x^2=9. 6). 16x^2=81. 7) 25x^2=0. 8). -3x^2=0. 9). 2x^2=14. 10). 3x^2=21

Answer 1

Ответ:

Объяснение:

1) x²=81    x=9  ,x=-9

2) x²=100   x=10 ,x=-10

3) x²=0,25   x=0,5  ,x=-0,5

4) x²=0,04    x=0,2  , x=-0,2

5) 4x^2=9  // : 4

X²=9/4        x=3/2    x=-3/2

6). 16x²=81 // : 16

X² =81/16    x=9/4    ,  x=-9/4

7) 25x²=0  // : 25

X=0  

8)-3x²=0  // :  ( -3)

X=0

9). 2x²=14  // : 2

        X²=7      x=√7   ,  x=-√7

10)3x²=21 // : 3

 X²=7      x=√7    x=-√7

Answer 2

To solve these equations, you can take the square root of both sides, but remember to consider both the positive and negative square roots:

1. x^2 = 81 x = ±√81 x = ±9

2. x^2 = 100 x = ±√100 x = ±10

3. x^2 = 0.25 x = ±√0.25 x = ±0.5

4. x^2 = 0.04 x = ±√0.04 x = ±0.2

5. 4x^2 = 9 x^2 = 9/4 x = ±√(9/4) x = ±(3/2)

6. 16x^2 = 81 x^2 = 81/16 x = ±√(81/16) x = ±(9/4)

7. 25x^2 = 0 x^2 = 0/25 x = ±√(0/25) x = 0

8. -3x^2 = 0 x^2 = 0/(-3) x = ±√(0/(-3)) x = 0

9. 2x^2 = 14 x^2 = 14/2 x^2 = 7 x = ±√7

10. 3x^2 = 21 x^2 = 21/3 x^2 = 7 x = ±√7

So, the solutions to the given equations are as follows:

1. x = ±9
2. x = ±10
3. x = ±0.5
4. x = ±0.2
5. x = ±(3/2)
6. x = ±(9/4)
7. x = 0
8. x = 0
9. x = ±√7
10. x = ±√7