Jawabanmu

2014-08-25T18:10:25+07:00
X² + 4x - 60 ÷ y = x - 10
x² + 4x - 60 ÷ x - 10 = y 
( dikali x-10 ÷ x-10 )
( x² + 4x - 60 ) ( x - 10 ) = y
x³ - 10x² + 4x² - 40x -60x + 100 = y
x³ - 6x² - 100x + 100 = y