Question

Factorise 20x^2 - 45​

Answer 1

Answer:

Given : 20x

2

−45

By taking 5 as common

20x

2

−45=5(4x

2

−9)

We can write it as

20x

2

−45=5((2x)

2

−3

2

)

Based on the equation a

2

−b

2

=(a+b)(a−b)

We get,

20x

2

−45=5(2x+3)(2x−3)

Answer 2

ANSWER :

5 ( 2X² - 3 )( 2x + 3)

STEP BY STEP EXPLANATION :

1. Common factor

20 x² - 45

5 ( 4x² - 9 )

THIS IS YOUR ANSWER....

MARK IT AS BRAINLIEST....

hope this image helps you...