Tolong bantu jawab tugas remidi ku T__T

[tex] {3}^{ {x}^{2} + x - 2} = {( {3}^{4} )}^{ x+ 2} \\ {3}^{ {x}^{2} + x - 2 } = {3}^{4x + 8} \\ {x}^{2} + x - 2 = 4x + 8 \\ {x}^{2} + x - 4x - 2 - 8 = 0 \\ {x}^{2} - 3x - 10 = 0 \\ (x -5)(x + 2) [/tex]
x=5 atau x=-2 karna yg memeuhi adalah 5. maka jawabannya 5