Solve the following inequality:
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it means (x-2)(x-4)(x-7)>(x+2)(x+4)(x+7)
(x²-6x+8)(x-7)>(x²+6x+8)(x+7)
x³-13x²+50x-56>x³+13x+50x+56
it means x³-x³+50x-50x>13x²+13x²+56+56
26x²+112>0
x²>-112/26
x>√-56/13=56/13iota
(x²-6x+8)(x-7)>(x²+6x+8)(x+7)
x³-13x²+50x-56>x³+13x+50x+56
it means x³-x³+50x-50x>13x²+13x²+56+56
26x²+112>0
x²>-112/26
x>√-56/13=56/13iota
Vanshika08112003:
Hey we can't cross multiply the equations
And the and is (-∞ , -7) U (-4, -2)
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