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2x^2-x> 0

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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

☐²

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log_□

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ddx

≥	≤	·	÷	`x`^◦	(☐)	\|☐\|	(`f` ◦ `g`)	`f`(`x`)	ln	`e`^☐
(☐)^′	∂∂`x`	∫_□^□	lim	∑	sin	cos	tan	cot	csc	sec

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√x−1−x=−7

Solution

x=10

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x⁴+25x²=0

Rewrite the equation with u=x² and u²=x⁴

u²+25u=0

Solve u²+25u=0: u=0, u=−25

u=0, u=−25

Substitute back u=x², solve for x

Solve x²=0: x=0

Solve x²=−25: x=5i, x=−5i

The solutions are

x=0, x=5i, x=−5i

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

2x^2-x> 0

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