Explanation

Open all brackets: 2x² + y + x + x + 2 - x - 3  

x terms: x + x - x = x  

Numbers: 2 - 3 = -1  

So final = 2x² + y + x - 1

Last verified on 16-06-2026

Explanation

• Plants need gas exchange for photosynthesis and respiration.
• Exchange of CO₂, O₂, and water vapor occurs through stomata on leaves.
• Stomata are tiny pores controlled by guard cells.

Additional information:

• Helps maintain internal water balance and gas diffusion.
• Essential for growth, energy production, and transpiration.

Last verified on 22-01-2026

Explanation

• Base Quantity: Length
• SI Unit: meter (m)
• Type: Fundamental quantity
• System: International System of Units (SI)

Additional information:

Base Quantities in SI System:

• Mass (kilogram)
• Time (second)
• Electric current (ampere)
• Temperature (kelvin)

Last verified on 16-06-2026

Explanation

• The Sun is the ultimate and main source of energy on Earth.
• It provides energy through solar radiation (light and heat).
• All forms of energy on Earth directly or indirectly come from the Sun.
• It supports life, climate, and ecosystems on Earth.

This energy is then converted into various forms, such as:

• Thermal energy (heat)
• Kinetic energy (wind, water currents)
• Electrical energy (generated from solar panels)
• Chemical energy (fossil fuels, biomass)
• Biological energy (food chains, ecosystems)

Last verified on 16-06-2026

Explanation

Multiply using distributive property:  

(4x + 2)(2x) = 4x × 2x + 2 × 2x  

= 8x² + 4x

Last verified on 16-06-2026

Explanation

We need two numbers that multiply to -2 and add to +1 → 2 and -1

x² + x − 2 = x² + 2x − x − 2  

= x(x + 2) − 1(x + 2)  

= (x + 2)(x − 1)

Last verified on 16-06-2026

Explanation

Use formula: (a − b)² = a² − 2ab + b²

Here a = x, b = 3  

(x − 3)² = x² − 2(x)(3) + 3²  

= x² − 6x + 9

Last verified on 16-06-2026

Explanation

Taiwan's Capital is Taipei.

Taiwan Currency is New Taiwan Dollar.

Taiwan, officially the Republic of China.

It was formerly known as Formosa.

Taiwan's official language is Mandarin.

Taiwan located is in the Continent of Asia.

Taiwan's Primary Religion is the Polytheistic ancient Chinese religion, Buddhism.

Taiwan's Head of Govt. is Prime Minister– Su Tseng-chang.

Taiwan Parliament called Yuan.

Tricks for Remember

DOLLAR

 Li-Ne-US-Ca-Fi-T-E-A

Mind trick: Li ne(a name) who lives in US likes Coffee(Ca- Fi) and Tea(T-E-A)

**Li-Ne**

Li-Liberia

Ne-New Zealand

**US**

United States

**Ca-Fi**

Ca-Canadian

Fi- Fizzi

**T-E-A**

T-Taiwan

E-Ethiopia

A-Australia

Last verified on 16-06-2026