Question

3a^(2) - 21a + 30 factor completely.

Answer 1

3(a^2 - 7a +10)=3(a^2 - 5a -2a +10)=3(a(a-5) -2(a-5))=3(a-5)(a-2)

Answer 2

take 3 as a common factor

\[3(a^2 - 7a + 10)\]

makes it a lot easier

Answer 3

this time have you understood how it becomes
-7a = -5a - 2a
@aimmeBgood

Answer 4

hello
\[3(a-2)(a-5)\]