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1/4x²+bx+a = 0 nilai a+b = ?
2 satu2nya akar berarti akarnya cuma ada satu
(x-2)² = 0 [ ini akarnya cuma x= 2]
x²-4x+4 = 0 [dibagi 4 semua biar sama dgn soal yg diketahui]
1/4x²-x+1 = 0....(1)
1/4x²+bx+a = 0...(2)
persamaan (1) = (2)
maka - 1 = b dan 1 = a , a+b = 0 jawaban C