Question

If
$if \: x = 2y + 6 \: find \: th e \: value \: of \: x3 - 8y3 - 36y - 216)$

Answer 1

0
put value of x in the equation and see the magic!
here,
(2y+6)^3-8y^3-26y-216
taking -1 common
(2y+6)^3-1(8y^3+36y+316)
by (a+b)^3,
(2y+6)^3-(2y+6)^3
0
That's your answer!
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