if x-2 by x =5 find the value of x cube -8by x cube
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Answer:
65
Step-by-step explanation:
☆ Given:
x-2 / x = 5
x-2 = 5x
x - 5x = 2
-4x =2
x = - 2/4
x = -1/2
☆ Solution:
We will substitute the value of x in the given equation i.e x^3 - 8 / x^3
= (-1/2)^3 - 8 / (-1/2)^3
= (-1/2×-1/2×-1/2) - 8 / (-1/2×-1/2×-1/2)
= -1/8 - 8 / -1/8
= -1 - 64/8 × -8 (taking 8 as L.C.M)
= -65/8 × -8
= -65 × -1
= 65
Your answer is 65.
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