Question

Tentukan himpunan dari ^2log x + ^2log (x+2) = 3

Answer 1

2log x + 2log (x+2) = 3
2log x ( x+2 ) = 2log 2^3
2log x^2 + 2x = 2log 8 <=>
x^2 + 2x = 8
x^2 + 2x - 8 = 0
( x - 2 ) ( x + 4 ) = 0
x = 2 atau x = -4 (tdk mmnuhi syarat)
jadi, HP = {2}