式の値L1-2-3(6問)
x=-4,y=-3のとき、次の式の値を求めよ。
5x-7y+6+2(2x+5y-3)
解答○ ×-4x+3y-9-5(-x+2y-3)
解答○ ×4(2x-7y-1)-9(x-3y+1)
解答○ ×7(-x+2y+6)+3(3x-5y-11)
解答○ ×-3(4x2+3x-8)-2(x2-5x+7)
解答○ ×6(2x2y-5xy2+xy)+4(-2x2y+7xy2-2xy)
解答○ ×問題と解答
5x-7y+6+2(2x+5y-3)-45 -4x+3y-9-5(-x+2y-3)23 4(2x-7y-1)-9(x-3y+1)-6 7(-x+2y+6)+3(3x-5y-11)4 -3(4x2+3x-8)-2(x2-5x+7)-218 6(2x2y-5xy2+xy)+4(-2x2y+7xy2-2xy)-144
