en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

expand (9x-4)^2

Solution

expand

(9 x - 4)^{2}

Solution

81 x^{2} - 72 x + 16

Solution steps

(9 x - 4)^{2}

Apply Perfect Square Formula:

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

(9 x - 4)^{2} = (9 x)^{2} - 2 \cdot 9 x \cdot 4 + 4^{2}

= (9 x)^{2} - 2 \cdot 9 x \cdot 4 + 4^{2}

Simplify

(9 x)^{2} - 2 \cdot 9 x \cdot 4 + 4^{2} : 81 x^{2} - 72 x + 16

= 81 x^{2} - 72 x + 16

Popular Examples

simplify (sqrt(2646))/(sqrt(9))simplify

\frac{2646}{9}

simplify 55/66 simplify

\frac{55}{66}

simplify sqrt(2)+sqrt(2)-5sqrt(2)simplify

2 + 2 - 52

expand a(a+1)expand

a (a + 1)

factor 3x^2+63x-66 factor

3 x^{2} + 63 x - 66

Frequently Asked Questions (FAQ)

What is expand (9x-4)^2 ?
The solution to expand (9x-4)^2 is 81x^2-72x+16