- {-0.78, 1.00}
- {-7,9}
- {-1.29,-1.29}
- {-0.66,1.95} I think my answer is A. {-0.78, 1.00}.

-7x

(approximately)= 9/14 ± 1.3034491 = .6428571 ± 1.3034491

.64 + 1.30 = 1.94 and .64 - 1.30 = -.66

So the answer is (-0.66, 1.95)

^{2}+ 9x + 9 = 0 has solutions (from the quadratic formula) x = [-9 ± √(81 - 4(-7)(9))]/-14 = -9/(-14) ± √(333)/(-14)(approximately)= 9/14 ± 1.3034491 = .6428571 ± 1.3034491

.64 + 1.30 = 1.94 and .64 - 1.30 = -.66

So the answer is (-0.66, 1.95)

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You can also use an excel spreadsheet to verify

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