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Sagot :
Answer: 10 (choice C)
Work Shown:
[tex](-x-5)^2\\\\(-x-5)(-x-5)\\\\y(-x-5) \ \text{... let } y = -x-5\\\\-xy-5y\\\\-x(y)-5(y)\\\\-x(-x-5)-5(-x-5) \ \text{... plug in } y = -x-5\\\\x^2+5x+5x+25\\\\x^2+\boldsymbol{10}x+25[/tex]
Therefore, [tex](-x-5)^2=x^2+\boldsymbol{10}x+25[/tex]
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