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Sagot :
Answer:
[tex]{(x-(-4))}^{2}+(-9)[/tex]
Step-by-step explanation:
solve by completing the square:
[tex]y=x^{2}+8x+7\\=x^{2}+2(4)(x)+{(4)}^{2}-{(4)}^{2}+7\\={(x+4)}^{2}-16+7\\={(x-(-4))}^{2}+(-9)[/tex]
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