H hahah New member Jul 4, 2009 #1 solve the equation: y^3 + 4y^2 - 25y - 100 = 0 what do i start with
B billrussell42 New member Jul 4, 2009 #2 try to extract common factors y³ + 4y² – 25y – 100 = 0 y²(y + 4) –25(y+4) = 0 (y² – 25)(y + 4) = 0 solution 1: y² – 25 = 0 y² = 25 y = ± 5 solution 2 y + 4 = 0 y = –4 .
try to extract common factors y³ + 4y² – 25y – 100 = 0 y²(y + 4) –25(y+4) = 0 (y² – 25)(y + 4) = 0 solution 1: y² – 25 = 0 y² = 25 y = ± 5 solution 2 y + 4 = 0 y = –4 .
