Jawabanmu

2014-09-10T20:08:14+07:00
Perkalian pelangi : (4x+6y)(16x²-12xy+9y²)
=(4x×16x²)-(4x×12xy)+(4x×9y²) + (6y×16x²)-(6y×12xy)+(6y×9y²)
=64x³-48x²y+36xy² + 96x²y-72xy²+54y³
=64x³-48x²y+96x²y+36xy²-72xy²+54y³
=64x²+48x²y-36xy²+54y³

2014-09-10T20:08:49+07:00
(4x + 3y)(16x^{2} - 12xy + 9y^{2})
= 64x^{3} - 48x^{2}y + 36xy^{2} + 48x^{2}y - 36xy^{2} + 27y^{3}
= 64x^{3} + 27x^{3} + 36xy^{2} - 36xy^{2} - 48x^{2}y + 48x^{2}y
= 91x^{3} + 0 + 0
= 91x^{3}