Question

Choose the correct simplification of the expression −5x2(4x − 6x2 − 3). 30x4 − 20x3 15x2 −11x4 − x3 − 8x2 −30x4 20x3 − 15x2 30x4 20x3 15x2.

Answer 1

30 x^4 - 20 x^3 + 15 x^2 is the only valid one however it's not the best simplification.

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)

Answer 2

30 x^4 - 20 x^3 + 15 x^2

Explanation: