The value of X3 y3 when X = 3,Y=7.
Answers
Answered by
0
Answer:
Step-by-step explanation:
Since, (x+y)
3
=x
3
+y
3
+3xy(x+y)
∴x
3
+y
3
=(x+y)
3
−3xy(x+y)
Given, x+y=8 and xy=7
⇒x
3
+y
3
=(8)
3
−3(7)(8)
=512−168=344.
Answered by
0
Answer:
x3 = 9
y3 = 21
Step-by-step explanation:
ATQ
x = 3
y = 7
x3 = x * 3 = 3 * 3 = 9
y3 = y * 3 = 7 * 3 = 21
Note : The sign ( * ) means multiplication.
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