find x^3-y^3,if x-y=5andxy=14
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Answer:(i) if x=7,y=2 then ans is -335
(ii)if x=-2,y=-7 then ans is 335
Step-by-step explanation:x-y=5........(i)
xy=14.........(ii)
x=y+5
Substitute the value of x in (ii)
(5+y)y=14
y^2+5y-14=0
By splitting the middle term
y(y+7)-2(y+7)=0
Case 1 x=7,y=2
Case 2 x=-2,y=-7
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