展開-4(8問)
次の式を展開せよ。
(x+1)(x-1)
解答○ ×(x-7)(x+7)
解答○ ×(x-13)(x+13)
解答○ ×(x+y)(x-y)
解答○ ×(2x+1)(2x-1)
解答○ ×(3x-13)(3x+13)
解答○ ×(2a-3b)(2a+3b)
解答○ ×(11a+12b)(11a-12b)
解答○ ×問題と解答
(x+1)(x-1)x2-1 (x-7)(x+7)x2-49 (x-13)(x+13)x2-169 (x+y)(x-y)x2-y2 (2x+1)(2x-1)4x2-1 (3x-13)(3x+13)9x2-169 (2a-3b)(2a+3b)4a2-9b2 (11a+12b)(11a-12b)121a2-144b2
