Answer:
The answer is -10d⁴ + 17d²s - 6s² and none of the alternatives given is correct. The closest one is D but the signal before 6s² should be negative.
Step-by-step explanation:
Let's estimate the product, this way:
(-2d^2+s)(5d^2-6s)
(-2d²+ s) * (5d²- 6s)
= -10d⁴ + 12d²s + 5d²s - 6s²
= -10d⁴ + 17d²s - 6s²
The answer is -10d⁴ + 17d²s - 6s² and none of the alternatives given is correct. The closest one is D but the signal before 6s² should be negative.
