☆問題のみはこちら→因数分解をマスターしよう(問題)
①x2+12x+36
=(x+6)2
②9x2−12xy+4y2
=(3x−2y)2
③a2−4b2
=(a+2b)(a−2b)
④x2+7x+10
=(x+5)(x+2)
⑤a2+5a−24
=(a+8)(a−3)
⑥3x2+5x+2
=(3x+2)(x+1)
⑦12x2−16x−3
=(6x+1)(2x−3)
⑧6a2+23ab−48b2
=(2a−3b)(3a+16b)
⑨x3−27
=(x−3)(x2+3x+9)
⑩64a3+125b3
=(4a+5b)(16a2−20ab+25b2)
⑪x3+6x2+12x+8
=(x+2)3
⑫a2+9b2+c2+6ab−6bc−2ac
=(a+3b−c)2
⑬a3+b3+c3−3abc
=(a+b+c)(a2+b2+c2−ab−bc−ca)