If x + y = 8, x - y = 4, xy = 12
The value of x3 + y3 =
Answers
Answered by
1
Answer:
hello mate here your answer
Step-by-step explanation:
x-y =4, xy =12
find value of x ³- y³
x³ - y ³= ( x- y ) ( x ² + y ² + xy )
=(4)(x² + y ²+12)
as find value of x² + y²
(x-y)²= x² +y² -2xy
(4)² =x² + y² - 2(12)
16 =x² + y² -24
16+24 =x²+y²
40 =x² + y²
put value in ....1
x³-y³= (4)(40+12)
=(4)(52)
= 208
Answered by
2
Answer:
valve of x=6 and y=2
Step-by-step explanation:
Here,
x+y=8. (1equation)
x-y=4. (2nd equation )
adding 1st and 2nd
2x=12
x=6
putting value of x in 1st we got,
6+y=8
or y=2
Hope it will help you to better understand
good luck
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