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= 2 (3x-4 + 2x+1)
= 2 (5x -3)
= 10x -6
=2(3x-4)+2(2x+1)
=6x-8+4x+2
=10x-6 cm
Luas = p x l
= (3x-4)(2x+1)
= 6x"+3x-8x-4
= 6x"-5x-4 cm"
Note: " -> kuadrat