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dengan rumus abc
a=3
b=-20
c=-50
a=3,b=-20,c=-50
rms ABC
x1,2= -b + √b²-4ac/2a
= -(-20)+√20²-4·3·-50/ 2·3
= 20+√400+600/6
= 20+√1000/ 6
= 20+10 √10 / 6
x1= 20 +10√10 /6 = 10 +5√10 / 3 = 10+15,8 / 3= 52,7
x2= 20 -10√10 / 6 = 10- 5√10 / 3 = 10 - 15,8 / 3 =1,9
kalo salah maaf yah,,