Answer:
Step-by-step explanation:
Hint:
a² - 9a + 15 = (a-7)(a-2)
a² + 9a + 15 = (a+7)(a+2)
a² + 3a - 10 = (a-2)(a+5)
a² + 5a - 14 = (a-2)(a+7)
a² - 5a - 14 = (a-7)(a+2)
