en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

factor 81-a^2

Solution

factor

81 - a^{2}

Solution

(9 + a) (9 - a)

Solution steps

81 - a^{2}

Rewrite

81

as

9^{2}

= 9^{2} - a^{2}

Apply Difference of Two Squares Formula:

x^{2} - y^{2} = (x + y) (x - y)

9^{2} - a^{2} = (9 + a) (9 - a)

= (9 + a) (9 - a)

Popular Examples

simplify (-1/2)^2 simplify

(- \frac{1}{2})^{2}

simplify (36+sqrt(1008))/(16)simplify

\frac{36 + 1008}{16}

3 (2 x + 1) + x = - 39

- 3 x + 2 \leq - 2 (x - 1)

factor 2m^3-6m^2-3m+9 factor

2 m^{3} - 6 m^{2} - 3 m + 9

Frequently Asked Questions (FAQ)

What is factor 81-a^2 ?
The solution to factor 81-a^2 is (9+a)(9-a)