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p=4+l
p=4+x karena subtitusi l=x
keliling = 2(p+l)
keliling = 2(4+x+x)
keliling = 2(2+2x)
keliling = 4+4x
l = x cm
p = 4 + x
Kel. Persegi Panjang :
= 2 ( p • l )
= 2 [(4 + x ) • x]
= 2 ( 4x + x^2 )
= 2x^2 + 8x
DitanyaKan Model Bukan NilaiNya Kann Jadi Sampai Situ Ajhaa.