Please answer in two questions.......
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hey man !!
x-y = 4
x= 4+y , putting this x in 2nd eqn
xy = 12
4+y×y = 12
4+y² = 12
y²= 8
y = 2√2
now , x-y = 4
x- 2√2=4
x = 4+2√2 = 6√2
now , x³-y³= 610.94-22.62 = 588.32 answer
hope that helps !!
x-y = 4
x= 4+y , putting this x in 2nd eqn
xy = 12
4+y×y = 12
4+y² = 12
y²= 8
y = 2√2
now , x-y = 4
x- 2√2=4
x = 4+2√2 = 6√2
now , x³-y³= 610.94-22.62 = 588.32 answer
hope that helps !!
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