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= 2(2x+4+4+x)
= 2(3x+8)
=6x+16
L=p×l
= (2x+4)(4+x)
=8x+2x^2+16+4x
= 2x^2 + 12x + 16
p = (2x + 4) cm
l = (4 + x ) cm
Dit:
Keliling (K) = ?
Luas (L) = ?
Jwab:
K = 2(p+l)
K = 2(2x + 4 + 4 + x )
K = 2(3x + 8)
K = 6x + 16 cm
L = p × l
L = (2x + 4) × (4 + x )
L = 8x + 2x² + 16 + 4x
L = 2x² + 12x + 16 cm²
Salam.......... ^^