Jawapan

2016-10-15T13:29:03+08:00
Luas kawasan berlorek (18)
=(12+2x)(5+2x)-12(5)
cukup 4 mrkh
Mna dpat 2x?
2x = × + ×
kn = kq(x) + qp(5) + pn(×)
kn = × + 5 × = 2× + 5
2016-10-15T13:42:46+08:00
Soalan ni melibatkn fungsi kuadratik.
(12 + 2x)(5 + 2x) - 60 = 18
60 + 24x + 10x + 4x² = 18 + 60
34x + 4x² = 18
4x² + 34x -18 = 0
(2x - 1)(2x + 18) = 0

x - 0.5 = 0
        x = 0.5

x + 9 = 0
      x = -9

Sorry klau salah > <