Question 143

$$(2x-1)^3+(3x-4)^3+(x-7)^3=(6x-3)(3x-4)(x-7)$$, then what is the value of $$x$$ ?

Solution

By using trial and error method,if we use

$$x=2$$,

$$L.H.S=27+8-125=-90.$$

and $$ R.H.S=9\times 2\times(-5)=-90.$$

So, $$x=2$$, is right answer.

C is correct answer.

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