Question

3x^2-243=0 solve it by factorisation method.​

Answer 1

Step-by-step explanation:

see photo step by step explain with full basics.

Answer 2

★ Given

3x² - 243 = 0

★ To find :

The value of x .

★ Solution :

3x² - 243 = 0

by taking 3 common

3(x² - 81) = 0

We know that ,

(a+b)(a-b) = a² - b²

x² - 81 =

x² - 9² = (x - 9)(x + 9)

3(x-9) (x+9) = 0

dividing 3 on both sides

(x-9)(x+9) = 0

one of them must become zero..

x - 9 = 0 , x = 9

x +9 = 0 , x = -9

★ x = ± 9

★ Additional Information -:

Types of Algebraic expressions -:

On the basis of variables

★ One variable

★ Two variables

On the basis of degree

★ Linear

★ Quadratic

★ Cubic

★ Biquadratic