Oblicz:
a.) (2x + 3) (4x² - 6x +9) =
b.) (4x - 6)(16x² + 24x +36) =
c.) (2x + 3y) (4x² + 6xy + 9y²) =
Chodzi tutaj o zastosowanie przekształceń algebraicznych.
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a). (2x+3) (4x²-6x+9)=8x^{3}-12x^{2}+18x+12x^{2}-18x+27=8x^{3}+27
b). (4x-6)(16x²+24x+36)=64x^{3}+96x^{2}+144x-96x^{2}-144x-216=64x^{3}-216
c.) (2x+3y)(4x²+6xy+9y²)=8x^{3}+12x^{2}y+18xy^{2}+12x^{2}y+18xy^{2}+27y^{3}=8x^{3}+24x^{2}y+36xy^{2}+27y^{3}