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b. 27x³y³
c. -16a⁴b⁴
d. 16a⁴b⁴
b)(3xy)^3= 3xy×3xy×3xy=27x^3y^3
c)(;2ab)^4=-2ab×-2ab×-2ab×-2ab=16a^4b^4
d)(4a²b²)²= 4a²b²×4a²b²=16a^4b^4
2.a)(x+2)²=(x+2)(x+2)=x²+2x+2x+4=x²+4x+4
b)3(2x-1)^3=3((2x-1)(2x-1)(2x-1))=3((4x²-2x-2x+1)(2x-1))=3(4x²-4x+1)(2x-1))=
3(8x^3-4x²-8x²+4x+2x-1)=3(8x^3-12x²+6x-1)=24x^3-36x²+18x-3
3.a)16p²:4p=4p
b)6ab²:a^3b=6b:a²