解
解く x,(5x+y)2+9x−2y=4x(−8y+3)3
解
x=50−874y+99+2304y2−2048y3+4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801,x=50−874y+99+2304y2−2048y3−4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801
解答ステップ
(5x+y)2+9x−2y=4x(−8y+3)3
拡張 (5x+y)2+9x−2y:25x2+10xy+y2+9x−2y
拡張 4x(−8y+3)3:−2048xy3+2304xy2−864xy+108x
25x2+10xy+y2+9x−2y=−2048xy3+2304xy2−864xy+108x
両辺から−864xy+108xを引く25x2+10xy+y2+9x−2y−(−864xy+108x)=−2048xy3+2304xy2−864xy+108x−(−864xy+108x)
簡素化
25x2+874xy−99x+y2−2y=−2048xy3+2304xy2
2304xy2を左側に移動します
25x2+874xy−99x+y2−2y−2304xy2=−2048xy3
2048xy3を左側に移動します
25x2+874xy−99x+y2−2y−2304xy2+2048xy3=0
標準的な形式で書く ax2+bx+c=025x2+(874y−99−2304y2+2048y3)x+y2−2y=0
解くとthe二次式
x1,2=2⋅25−(874y−99−2304y2+2048y3)±(874y−99−2304y2+2048y3)2−4⋅25(y2−2y)
簡素化 (874y−99−2304y2+2048y3)2−4⋅25(y2−2y):4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801
x1,2=2⋅25−(874y−99−2304y2+2048y3)±4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801
解を分離するx1=2⋅25−(874y−99−2304y2+2048y3)+4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801,x2=2⋅25−(874y−99−2304y2+2048y3)−4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801
x=2⋅25−(874y−99−2304y2+2048y3)+4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801:50−874y+99+2304y2−2048y3+4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801
x=2⋅25−(874y−99−2304y2+2048y3)−4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801:50−874y+99+2304y2−2048y3−4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801
二次equationの解:x=50−874y+99+2304y2−2048y3+4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801,x=50−874y+99+2304y2−2048y3−4194304y6−9437184y5+8888320y4−4432896y3+1219968y2−172852y+9801