式の値L2-1-5(6問)
x=43,y=-52のとき、次の式の値を求めよ。
115x2-32xy+56x2
解答○ ×14xy-212x-52xy+92
解答○ ×14x2+53y2+15x2-75y2
解答○ ×53x2+57xy+(215x2-314xy)
解答○ ×52x2y+15xy2+12-(34x2y-35xy2-34)
解答○ ×114x2y+15xy2+16xy-(-221x2y+13xy2-518xy)
解答○ ×問題と解答
115x2-32xy+56x2335 14xy-212x-52xy+92-2 14x2+53y2+15x2-75y23715 53x2+57xy+(215x2-314xy)2315 52x2y+15xy2+12-(34x2y-35xy2-34)536 114x2y+15xy2+16xy-(-221x2y+13xy2-518xy)-103
