lex23425 lex23425

02-05-2020
Mathematics

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Respuesta :

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02-05-2020

Answer:

X = 1 ± √(-1)²+4(7)(9) / 2(7)

Step-by-step explanation:

7x² = 9+x

7x²-x-9 = 0

X = 1 ± √(-1)²-4(7)(-9) / 2(7)

X = 1 ± √(-1)²+4(7)(9) / 2(7)

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