(y²-4)(y²+2y+1) Bantu jwb

(y²-4)(y²+2y+1) Bantu jwb

Jawaban

${y}^{4} + 2 {y}^{3} - 3 {y}^{2} - 8y - 4$

Penyelesaian

$( {y}^{2} - 4)( {y}^{2} + 2y + 1) \ = {y}^{2} times ( {y}^{2} + 2y + 1) - 4( {y}^{2} + 2y + 1) \ = {y}^{4} + 2 {y}^{3} + {y}^{2} - 4 {y}^{2} - 8y - 4 \ = {y}^{4} + 2 {y}^{3} - 3 {y}^{2} - 8y - 4$