1. 2(x^2 + y^2)(x + y)^2 & minus ; (x^2 & minus ; y^2)^2 = 2(x^2 + y^2)(x + y)^2 & minus ; [(x+y)(x& minus ; y)]^2...x^2 + y^2)(x + y)^2 & minus ; (x+y)^2(x& minus ; y)^2 = (x+y)^2 [2(x^2 + y^2)& minus ; (x& minus ; y)^2 ] = (x+y)^2 [2x^2 + 2y^2& minus ; (x^2& minus ; 2xy +y^2...
plus minus times divided by equals 1. x times 3 plus 4 ...to 39. 3. Suppose the two continuous even numbers are x minus 2 and x. (x minus 2) plus x larger or equals to 36 x times...
7. Factorize the following expressions. (a) 4n2(m & minus ; 8n) & minus ; 2n(8n & minus ; m) + 6mn(8n & minus ; m) = 4n^2 (m - 8n) - 2n (8n - m) (1-3m...
x^2 & minus ; 7x + 12 < x + 5 x^2-8x+7<0 (x-7)(x-1...;0 1< x <7 y = x^2 & minus ; 7x + 12 y = x + 5 x^2 & minus ; 7x + 12 = x + 5 (x-7)(x-1)=0 x=7 or x=1 the...
T - 表示 countdown , 倒數計時. T- minus -2, 距離原先準備的任務(eg. 發射火箭, 爆破), 尚餘 2小時
圖片參考：http://i. minus .com/ixSHhR9E3j1XO.gif 圖片參考：http://i. minus .com/ibl9PtDM3KlXjV...身高的發育，所以每天至少要保持8~9個小時的睡眠時間， 圖片參考：http://i. minus .com/ibl9PtDM3KlXjV.gif 2.每天運動1~3小時，適當運動可以刺激骨骼...
... thefollowing expressions. (a) 36a ^2& minus ; 9 =9( 4a ^2－1) =9( 2a +1)( 2a－1) (b) 27 & minus ; 12b^2... the following expressions. (a) 28a ^2& minus ; 140ab+ 175b^2 =7( 4a ^2－20ab+25b^2) =7( 2a－5b)^2 (b) 45a...
... a and b are the roots of x²+3x& minus ;2=0, we have a²+3a& minus ;2=0 b²+3b& minus ;2... minus ;3 2 x²+2ax +b=0 x²+2ax+a²+b& minus ;a²=0 (x+a)² +b& minus ;a²=0 (x+a...