1.It is given that a:b+4=3:7
a)Express a in term of b.
b)If 4a+5b=74 , find the values of a and b .
2.If 5(y^2 -1)+Ay-10Ξ(y-B)(Cy+5) , find the vlues of the unknows A ,B and C.
2007-08-20 09:26:55 · 1 個解答 · 發問者 ? 1 in 科學 ➔ 數學
圖片參考：http://hk.geocities.com/hoocch2ch2cooh/diagrams/Math0820_1a.jpg
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圖片參考：http://hk.geocities.com/hoocch2ch2cooh/diagrams/Math0820_1b.jpg
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圖片參考：http://hk.geocities.com/hoocch2ch2cooh/diagrams/Math0820_2.jpg
2007-08-20 10:58:08 · answer #1 · answered by Uncle Michael 7 · 0⤊ 0⤋