Question

Factorise the following question:​

Answer 1

( 5x - 3 ) ² - ( 5x - 3 ) - 20

Using the identity

• ( a - b ) ² = a² - 2ab + b²

(5x)² - 2 x 5x x 3 + 3² - 5x + 3 - 20

25x² - 30x + 9 - 5x + 3 - 20

25x² - 40x - 8 ➡ Answer

Answer 2

Step-by-step explanation:( 5x - 3 ) ² - ( 5x - 3 ) - 20

Using the identity

• ( a - b ) ² = a² - 2ab + b²

(5x)² - 2 x 5x x 3 + 3² - 5x + 3 - 20

25x² - 30x + 9 - 5x + 3 - 20

25x² - 40x - 8 ➡ Answer

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