九点之前(1)已知x^2-6x+8y+y^2+25=0,求2x+3y的值.(2)因式分解:a^2+b^2-2ab-2b+2a+1 (x+1)(x+2)(x+3)(x+4)+1 (1-a^2)(1-b^2)-4ab(3)简便计算:(2008^3-2#2008^2-2006)/(2008^3+2008^2-2009)急!
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![九点之前(1)已知x^2-6x+8y+y^2+25=0,求2x+3y的值.(2)因式分解:a^2+b^2-2ab-2b+2a+1 (x+1)(x+2)(x+3)(x+4)+1 (1-a^2)(1-b^2)-4ab(3)简便计算:(2008^3-2#2008^2-2006)/(2008^3+2008^2-2009)急!](/uploads/image/z/6895278-54-8.jpg?t=%E4%B9%9D%E7%82%B9%E4%B9%8B%E5%89%8D%EF%BC%881%EF%BC%89%E5%B7%B2%E7%9F%A5x%5E2-6x%2B8y%2By%5E2%2B25%3D0%2C%E6%B1%822x%2B3y%E7%9A%84%E5%80%BC.%EF%BC%882%EF%BC%89%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9Aa%5E2%2Bb%5E2-2ab-2b%2B2a%2B1+%28x%2B1%29%28x%2B2%29%28x%2B3%29%28x%2B4%29%2B1+%281-a%5E2%29%281-b%5E2%29-4ab%EF%BC%883%EF%BC%89%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%3A%282008%5E3-2%232008%5E2-2006%29%2F%282008%5E3%2B2008%5E2-2009%29%E6%80%A5%21)
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九点之前(1)已知x^2-6x+8y+y^2+25=0,求2x+3y的值.(2)因式分解:a^2+b^2-2ab-2b+2a+1 (x+1)(x+2)(x+3)(x+4)+1 (1-a^2)(1-b^2)-4ab(3)简便计算:(2008^3-2#2008^2-2006)/(2008^3+2008^2-2009)急!
九点之前
(1)已知x^2-6x+8y+y^2+25=0,求2x+3y的值.(2)因式分解:a^2+b^2-2ab-2b+2a+1 (x+1)(x+2)(x+3)(x+4)+1 (1-a^2)(1-b^2)-4ab(3)简便计算:(2008^3-2#2008^2-2006)/(2008^3+2008^2-2009)急!
九点之前(1)已知x^2-6x+8y+y^2+25=0,求2x+3y的值.(2)因式分解:a^2+b^2-2ab-2b+2a+1 (x+1)(x+2)(x+3)(x+4)+1 (1-a^2)(1-b^2)-4ab(3)简便计算:(2008^3-2#2008^2-2006)/(2008^3+2008^2-2009)急!
1、X=3,Y=-4,
2X+3Y=-6
2、①(a-b+1)^2
②X^4+10X^3+35X^+50X+25
③a^4b^4-2a^2b^2-4ab+1
3、2006/2009