因数分解(基本問題4)
次の式を因数分解しなさい
x2+13x+12 x2+2x-168 x2-3x-130 x2+30x+200 x2-19x+84 x2-22x+105 x2-14x+45 x2-20x+96 x2+x-306 x2-4x-320 x2+8x-105 x2+5x-50 x2+26x+169 x2-28x+196
解説リクエスト
x2+13x+12 x2+2x-168 x2-3x-130 x2+30x+200 x2-19x+84 x2-22x+105 x2-14x+45 x2-20x+96 x2+x-306 x2-4x-320 x2+8x-105 x2+5x-50 x2+26x+169 x2-28x+196