what must be added to 3a3 -7a2 + 8a -2 to make the sum 5a3 -6a2 -2a -9 ?
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Answer:
x = 2a³ - 13a² + 6a - 11
Step-by-step explanation:
Let the number be x.
==: 3a³ -7a² + 8a -2 + x = 5a³ - 6a² -2a -9
==: x = 5a³ - 6a² -2a -9 - (3a³ -7a² + 8a -2)
==: x = 5a³ - 6a² -2a - 9 - 3a³ -7a² + 8a -2
==: x = 2a³ - 13a² + 6a - 11
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