mistynunez53 mistynunez53

20-03-2020
Mathematics

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Which of the following is equivalent to 4-4a-(5+a)(5-a)

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agathauraiengcau agathauraiengcau

21-03-2020

Answer:

[tex] {a}^{2}-4a - 21 = 0[/tex]

Step-by-step explanation:

[tex]4 - 4a - (5 + a)( 5- a) = 0[/tex]

[tex]4 - 4a - (25 - 5a + 5a - {a}^{2} = 0 [/tex]

[tex]4 - 4a - 25 + 5a - 5a + {a}^{2} = 0[/tex]

[tex] {a}^{2} - 4a + 5a - 5a + 4 - 25 = 0[/tex]

[tex] {a}^{2} - 4a - 21 = 0[/tex]

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