式の値L2-1-4(6問)
x=-3,y=54のとき、次の式の値を求めよ。
112x2-3y+15y
解答○ ×43xy+2y-85xy+12
解答○ ×49x2+45xy-23x2+2xy
解答○ ×56x2-45y2-(-23x2+4y2)
解答○ ×85x2y+xy-133-815x2y+110xy-72
解答○ ×59x2y+25xy2+23xy-(13x2y-145xy2+75xy)
解答○ ×問題と解答
112x2-3y+15y-114 43xy+2y-85xy+124 49x2+45xy-23x2+2xy-252 56x2-45y2-(-23x2+4y2)6 85x2y+xy-133-815x2y+110xy-72124 59x2y+25xy2+23xy-(13x2y-145xy2+75xy)-394
