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標題:
急問!唔該! 中三factorization一題
Factorize r^2 + 10r + 25 - s^2
最佳解答:
=r^2+2(r)(5)+5^2-s^2 =(r+5)^2-(s)^2 =(r+5+s)*(r+5-s)
其他解答:
= r^2 + 2*5*r + 5^2 -s^2 = (r+5)^2 - s^2 = (r+5+s) (r+5-s) as (A+B)(A-B) = A^2 - B^2|||||r^2 + 10r + 25 - s^2 = r^2 + 2*5*r + 5^2 -s^2 = (r+5)^2 - s^2 = (r+5+s) (r+5-s) as (A+B)(A-B) = A^2 - B^2
急問!唔該! 中三factorization一題
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發問:Factorize r^2 + 10r + 25 - s^2
最佳解答:
=r^2+2(r)(5)+5^2-s^2 =(r+5)^2-(s)^2 =(r+5+s)*(r+5-s)
其他解答:
= r^2 + 2*5*r + 5^2 -s^2 = (r+5)^2 - s^2 = (r+5+s) (r+5-s) as (A+B)(A-B) = A^2 - B^2|||||r^2 + 10r + 25 - s^2 = r^2 + 2*5*r + 5^2 -s^2 = (r+5)^2 - s^2 = (r+5+s) (r+5-s) as (A+B)(A-B) = A^2 - B^2
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