Question

41. Розв'яжіть рiвняння: x+1 1) x-3 = 0; 2) x2 x²-16 = 0; x +4 3) x+² = 0; x-4 2 4) 5 3 x+7 x-7 -= 0; 9A-0+15) x+1 - 3x+1. x-4 3x-1 6) 9x-7 3x-2 7) a zas 8) 2 +20 x x²-4 2 18 4x-5=1; 2x-3 An x-3 x-3 6 2-х x +2 --- S-5 2 x² -7x x²+7x x-5-9 2 x - 49 =0.​

Answer 1

Ответ:

1) x - 3 = 0

x = 3

2) x² - 16 = 0

(x - 4)(x + 4) = 0

x = 4 or x = -4

3) x² = 0

x = 0

4) 5x + 7 - (x - 7) = 0

5x + 7 - x + 7 = 0

4x + 14 = 0

4x = -14

x = -14/4

x = -7/2

5) x + 1 - 3x + 1 = 0

-2x + 2 = 0

-2x = -2

x = 1

6) 9x - 7 = 3x - 2

9x - 3x = -2 + 7

6x = 5

x = 5/6

7) 2x + 20 = x² - 4

x² - 2x - 24 = 0

(x - 6)(x + 4) = 0

x = 6 or x = -4

8) 2x - 5 = 1; 2x - 3 = x - 3

2x = 6

x = 3

Объяснение:

надеюсь помогла)