Answer:
21 x² - 33x + 9
Step-by-step explanation:
It is required to simplify (5x-3)²-4x²-3x
So,
(5x-3)²-4x²-3x
= (5x-3) (5x-3) -4x²-3x
= 25 x² - 30x + 9 - 4x² - 3x
Combine like terms
= 25 x² - 4x² - 30x - 3x + 9
= 21 x² - 33x + 9
(5x-3)²-4x²-3x in a simplified form is⇒ 21 x² - 33x + 9
