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

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prove that 4(x-3)^2-21=4x^2-24x+15

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

☐²

x^☐

√☐

^□√☐

□□

log_□

π

θ

∞

∫

ddx

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

simplify solve for expand factor rationalize

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(−7)× (16÷ (18−22))+(−25)

Solution

3

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(−7)× (16÷ (18−22))+(−25)

Thực hiện theo trình tự hoạt động của PEMDAS

Tính trong ngoặc đơn (16÷ (18−22)) : −4

=(−7)× (−4)+(−25)

Nhân và chia (từ trái sang phải) (−7)× (−4) : 28

=28+(−25)

Cộng và trừ (từ trái sang phải) 28+(−25) : 3

=3

Prove That Examples

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