en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

expand (9-2x)^2

Solution

expand

(9 - 2 x)^{2}

Solution

81 - 36 x + 4 x^{2}

Solution steps

(9 - 2 x)^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(9 - 2 x)^{2} = 9^{2} - 2 \cdot 9 \cdot 2 x + (2 x)^{2}

= 9^{2} - 2 \cdot 9 \cdot 2 x + (2 x)^{2}

Simplify

9^{2} - 2 \cdot 9 \cdot 2 x + (2 x)^{2} : 81 - 36 x + 4 x^{2}

= 81 - 36 x + 4 x^{2}

Popular Examples

factor x^2-16/49 factor

x^{2} - \frac{16}{49}

simplify (2pi)/(1.2)simplify

\frac{2 π}{1.2}

expand (x^2z)(3x^2y^3+z^4)expand

(x^{2} z) (3 x^{2} y^{3} + z^{4})

simplify-8+(-6)simplify

- 8 + (- 6)

1\div (sqrt(2))/2

1 \div \frac{2}{2}

Frequently Asked Questions (FAQ)

What is expand (9-2x)^2 ?
The solution to expand (9-2x)^2 is 81-36x+4x^2