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Venusespanol2go
Answered

what should the added to 3 x cubed + 4x squared - 7 to have a sum of 4 x cubed plus x squared plus 5​

Sagot :

Jonacriezldelacruzgo

Answer:

x³ - 3x² + 12

Explanation:

Let N be the unknown addend.

4x³ + x² + 5 = 3x³ + 4x² - 7 + N

Combine like/similar terms.

4x³ + x² + 5 - 3x³ - 4x² + 7 = N

x³ - 3x² + 12 = N

Checking:

4x³ + x² + 5 = 3x³ + 4x² - 7 + x³ - 3x² + 12

4x³ + x² + 5 = 4x³ + x² + 5

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