Answer:
30 x^4 - 20 x^3 + 15 x^2 is the only valid one however it's not the best simplification.
Step-by-step explanation:
Simplify the following:
-5 x^2 (-6 x^2 + 4 x - 3)
Hint: Factor a minus sign out of -6 x^2 + 4 x - 3.
Factor -1 out of -6 x^2 + 4 x - 3:
-5 x^2×(-(6 x^2 - 4 x + 3))
Hint: Multiply -5 and -1 together.
-5 (-1) = 5:
Answer: 5 x^2 (6 x^2 - 4 x + 3)
