why is -x^4 equal to x^4

⇥We solve in

ℝ

- x^{4} = x^{4}

⇥

- x^{4} - x^{4} = 0

⇥ⓘ Like terms are grouped by adding their coefficients:

- x^{4} - x^{4}

-2 x^{4}

⇥

-2 x^{4} = 0

⇥We carry out the simplification of the expression by

-2

⇥⇥We solve in

ℝ

x^{4} = 0

⇥⇥

x^{4} = 0

means that:

x = 0

⇥⇥Solution obtained:

x = 0

▶ $- x^{4}$ and $x^{4}$ are equal only for $x = 0$

⊕

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