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標題:
Quadratic Equations
發問:
Find two integers which when added give the first number,and when multiplied give the second number (I)3,-18 (II)4,-5 (III)-21,110 (IV)16,63
最佳解答:
i) -3 and 6 -3+6=3, (-3)*6=18 ii) -1 and 5 -1+5=4, (-1)*5=-5 iii) -11 and -10 -11-10=-21, (-11)(-10)=110 iv) 7 and 9 7+9=16, 7*9=63 Just think of the multiples of the second number. 2013-04-23 18:35:14 補充： think about* =.="
其他解答:
圖片參考：http://i.imgur.com/hWW2wTM.png http://i.imgur.com/hWW2wTM.png
Quadratic Equations
發問:
Find two integers which when added give the first number,and when multiplied give the second number (I)3,-18 (II)4,-5 (III)-21,110 (IV)16,63
最佳解答:
i) -3 and 6 -3+6=3, (-3)*6=18 ii) -1 and 5 -1+5=4, (-1)*5=-5 iii) -11 and -10 -11-10=-21, (-11)(-10)=110 iv) 7 and 9 7+9=16, 7*9=63 Just think of the multiples of the second number. 2013-04-23 18:35:14 補充： think about* =.="
其他解答:
圖片參考：http://i.imgur.com/hWW2wTM.png http://i.imgur.com/hWW2wTM.png
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