mathz求求幫手
2011-03-11 1:30 pm
suggest 5 different loinear equations which both have x=4,y=-1 as the solution
回答 (1)
2011-03-11 6:29 pm
✔ 最佳答案
by point slope form : point (4,-1), slope =2y - (-1) = 2(x-4)2x-8 = y+11) 2x-y-9 = 0 similarly point (4,-1), slope = -2the required linear equation 2) 2x+y-7 =0 or by two point form find the linear equation passing through (4,-1),and the other point say (1,1)y-1/x-1 = [1-(-1)]/[1-4]y-1/x-1 = 2/-3
3) 2x+3y -5 = 0 the other equations :4) x = 4 5) y= -1
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