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Verified answer
Luas layang layang = d1 . d2 / 2d1 = 2x + 5
luas = 6x² + 9x + 10
(2x+5).y/2=(6x²+9x+10)
(2x+5).y = 2(6x²+9x+10)
y = 12x²+18x+20/2x+5
gunakan cara pemfaktoran
(2x+5).(3x+4) = (12x²+18x+20)
Persamaan (Lanjutan)
y = 12x²+18x+20/2x+5
y = (3x+4) cm