what is formula of (x-y)3
Answers
Answered by
123
hey dude,
The formula is (x-y)³=x³-3x²y+3xy²-y³. You convert it to (x-y)³=x³-3xy(x-y)-y³ for an illustration. ...You take the drawing of the formula (x+y)³=x³+3x²y+3xy²+y³ from above and replace a by the difference x-y. Then the edges are (x-y)+y with different combinations (on the left).
or
(x - y) 3 = x3 - 3x2y + 3xy2-y3
The formula is (x-y)³=x³-3x²y+3xy²-y³. You convert it to (x-y)³=x³-3xy(x-y)-y³ for an illustration. ...You take the drawing of the formula (x+y)³=x³+3x²y+3xy²+y³ from above and replace a by the difference x-y. Then the edges are (x-y)+y with different combinations (on the left).
or
(x - y) 3 = x3 - 3x2y + 3xy2-y3
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Answered by
24
Given,
The expression (x-y)³ is given.
To find,
The formula of (x-y)³
Solution,
The formula of (x-y)³ is x³-y³-3x²y +3xy².
(x-y)³= (x-y)² (x-y)
= (x²+y²-2xy)(x-y) [(a-b)² = a²+b²-2ab]
= (x³-x²y+y²x-y³-2x²y+2xy²)
=( x³-y³-3x³y+3xy²)
Hence, the formula of (x-y)³ is x³-y³-3x³y+3xy².
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