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from y² + 5 y - 7, subtract y² - 3 y - 4​n​

Sagot :

[tex] \: {y }^{2} + 5y - 7 \: subtract \: ({y}^{2} - 3y - 4n) \\ {y}^{2} + 5y - 7 - {y}^{2} + 3y + 4n \\ y {}^{2} - {y}^{2} + 5y + 3y + 4n - 7 \\ 8y + 4n - 7[/tex]

Answer: 8y + 4n - 7

Explanation: In the attachment.
View image codywallace0014