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b. L= p.l = 4x².2x³= 8x pangkat 5
34. a. 100= 2((5x+3)+(2x+5))
100=2(7x+8)
100=14x+16
84=14x
x=6
Jadi panjangnya 5x+3=5(6)+3=33
dan lebarnya 2x+5=2(6)+5=17
b. L=p.l= 33.17 = 561