分解因式(x-1)²-49 9(a-b)²-30(a-b)+25 -3ax²+6axy-3ay²(x-1)²-49、 9(a-b)²-30(a-b)+25 、-3ax²+6axy-3ay²
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![分解因式(x-1)²-49 9(a-b)²-30(a-b)+25 -3ax²+6axy-3ay²(x-1)²-49、 9(a-b)²-30(a-b)+25 、-3ax²+6axy-3ay²](/uploads/image/z/2117373-69-3.jpg?t=%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%28x-1%29%26%23178%3B-49+9%28a-b%29%26%23178%3B-30%28a-b%29%2B25+-3ax%26%23178%3B%2B6axy-3ay%26%23178%3B%28x-1%29%26%23178%3B-49%E3%80%81+9%28a-b%29%26%23178%3B-30%28a-b%29%2B25+%E3%80%81-3ax%26%23178%3B%2B6axy-3ay%26%23178%3B)
分解因式(x-1)²-49 9(a-b)²-30(a-b)+25 -3ax²+6axy-3ay²(x-1)²-49、 9(a-b)²-30(a-b)+25 、-3ax²+6axy-3ay²
分解因式(x-1)²-49 9(a-b)²-30(a-b)+25 -3ax²+6axy-3ay²
(x-1)²-49、 9(a-b)²-30(a-b)+25 、-3ax²+6axy-3ay²
分解因式(x-1)²-49 9(a-b)²-30(a-b)+25 -3ax²+6axy-3ay²(x-1)²-49、 9(a-b)²-30(a-b)+25 、-3ax²+6axy-3ay²
1.(x-1-7)(x-1+7)=(x-8)(x+6)
2.(3(a-b))^2-30(a-b)+5^2
=[3(a-b)-5]^2
3.(-3ax+3ay)(x-y)
(x-1)²-49=(x-1-7)(x-1+7)=(x-8)(x+6)
9(a-b)²-30(a-b)+25=[3(a-b)]²-30(a-b)+5²=[3(a-b)-5][3(a-b)+5]=(3a-3b-5)(3a-3b+5)
-3ax²+6axy-3ay²=-3a(x²-2xy+y²)=-3a(x-y)²