Question

No 1-3 aja.. makasih banyak

Answer 1

1) kesamaan terjadi saat pangkatnya = 0
x² - 2x = 0
x(x - 2) = 0
x = 0 atau x = 2

2) 2^(2x + 2) + 2^y = 20
   2^(x - 1) - 2^y = - 3
  ____________________ +
2^(2x + 2) + 2^(x - 1) = 17
4. 2^(2x) + (1/2)2^x = 17 (kalikan 2)
8. 2^(2x) + 2^x = 34
misal: 2^x = a
8a² + a - 34 = 0
(8a + 17)(a - 2) = 0
ambil a = 2
maka
2^x = 2
x = 1
substitusi:
2^(1 - 1) - 2^y = - 3
1 + 3 = 2^y
y = 2

3) kesamaan terjadi saat pangkatnya  = 0
x² - x - 6 = 0
(x + 2)(x - 3) = 0
x = - 2 atau x = 3