Answer:
3x² + 4x
Step-by-step explanation:
given
3x(2x + 3) - x(3x + 5) ← distribute parenthesis
= 6x² + 9x - 3x² - 5x ← collect like terms
= (6x² - 3x² ) + (9x - 5x )
= 3x² + 4x
