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(3x-y). (3x-y) = 9x²-3xy-3xy+ y²
maka : 9x²-6xy+ y²
2. 12a⁶b⁵ : (3a²b × 3a³b²)
= 12a⁶b⁵ : (3×3 a²⁺³b¹⁺²)
= 12a⁶b⁵ : 9a⁵b³
= 108ab²
3.. -3(2p+1) dari p+ 5
= -6p-3 - p+5
= -7p + 2
4. 3p³q² × 2p²qr²
=(3×2) p³⁺²q²⁺¹r²
= 6p⁵q³r²
smoga bermanfaat !!
= 9x²-6xy+y²