Question

Akar" persamaan 2x pangkat 2 - 6x +2m -1 =0 adlh a dan b.jika a=2b,maka nilai m adalah...

Answer 1

-6x+2m-1=0
a=2b

a x b = (2m-1)/2
a + b = (-6)/2 = -3

a + b = -3
2b + b = -3
3b = -3
b = -1

maka, a = -2

a x b = (2m-1)/2
(-2) x (-1) = (2m-1)/2
2 = (2m-1)/2
2 x 2 = 2m-1
4 = 2m-1
4 + 1 = 2m
5 = 2m
5/2 = m
2,5 = m