式の値L2-1-3(6問)
x=12,y=-2のとき、次の式の値を求めよ。
53x+52y-113x
解答○ ×-57x-37y+23y+13
解答○ ×73x-85y-75x+43y
解答○ ×32x+14y+(23x-58y)
解答○ ×65x2-34y2-112-23x2+52y2-43
解答○ ×13x2+56xy+14y-(56x2-23xy+38y)
解答○ ×問題と解答
53x+52y-113x-6 -57x-37y+23y+13-12 73x-85y-75x+43y1 32x+14y+(23x-58y)116 65x2-34y2-112-23x2+52y2-43310 13x2+56xy+14y-(56x2-23xy+38y)-118
