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maths....急!!!!!!!!!!!!

發問:

factorize.... 25-(y-4)^2

最佳解答:

25-(y-4)^2 =5^2-(y-4)^2 =(5-(y-4))(5+(y-4)) =(5-y+4)(5+y-4) 2006-11-30 23:51:44 補充： =(5-y 4)(5┼y-4)=(9-y)(1┼y)

其他解答:

25-(y-4)^2 =5^2-(y-4)^2 =(5+y-4)(5-y+4) =(1+y)(9-y) Hope it could help you!|||||25-(y-4)^2 =25 - (y^2 - 8y + 16) =25 - y^2 + 8y - 16 =-y^2 + 8y - 16 +25 =-y^2 + 8y + 9 =(-x+9)(x+1) =-(x-9)(x+1)|||||=25-y^2-16+8y =-y^2+8y+9 =(y-9)(-y-1)|||||25-(y-4)^2 =5^2-(y-4)^2 =[5+(y-4)][5-(y-4)] =(y+1)(9-y) Good Lucky For You