Answer: B. -8d⁴ - 10d³ - 3d
Explanation:
Given expression
(-7d³ + 5d + 5d² - 6d⁴) - (8d + 5d² + 2d⁴ + 3d³)
Expand parentheses
(REMEMBER to change [+, -] signs when there is a [-] sign in front)
=-7d³ + 5d + 5d² - 6d⁴ - 8d - 5d² - 2d⁴ - 3d³
Put like terms together
=-6d⁴ - 2d⁴ - 7d³ - 3d³ + 5d² - 5d² + 5d - 8d
Combine like terms
=(-6d⁴ - 2d⁴) - (7d³ + 3d³) + (5d² - 5d²) + (5d - 8d)
=-8d⁴ - 10d³ + 0 - 3d
=
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