Question

1/2a^2 + 2a =6
berapakah a nya
tolong pakai cara/langkah2nya y

Answer 1

1/2 a² + 2a = 6 --> semua dikali 2
=> a² + 4a = 12
=> a² + 4a - 12 = 0
=> (a + 6)(a - 2) = 0
=> a = -6 atau a = 2

Answer 2

(1/2a^2+2a=6)x2
a^2+4a=12
a^2+4a-12=0
(a+6)(a-2)
a=-6 atau a=2