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x = 3
k (3)² + k (3) - 36 = 0
9k + 3k - 36 = 0
12k = 36
k = 36/12
k = 3
3x² + 3x - 36 = 0 --> kedua ruas dibagi 3
x² + x - 12 = 0
(x + 4) (x - 3) = 0
x = -4 atau x = 3
maka akar yg lain adalh -4
semoga membantu ya :)
kx² + kx - 36 = 0
k(3)² + k(3) - 36 = 0
9k + 3k = 36
12k = 36
k = 36/12
k = 3
3x² + 3x - 36 = 0
x² + x - 12 = 0
(x+4)(x-3) = 0
x+4 = 0
x = -4