−7x+8−10x 2
=7minus, 7, x, plus, 8, minus, 10, x, squared, equals, 7
Choose 1
Choose 1

(Choice A)
A
x =\dfrac{7 \pm \sqrt{89}}{-20}x=
−20
7±
89
​

​
x, equals, start fraction, 7, plus minus, square root of, 89, end square root, divided by, minus, 20, end fraction

(Choice B)
B
x =\dfrac{-9 \pm \sqrt{249}}{-12}x=
−12
−9±
249
​

​
x, equals, start fraction, minus, 9, plus minus, square root of, 249, end square root, divided by, minus, 12, end fraction

(Choice C)
C
x =\dfrac{2 \pm \sqrt{29}}{5}x=
5
2±
29
​

​
x, equals, start fraction, 2, plus minus, square root of, 29, end square root, divided by, 5, end fraction

(Choice D, Checked)
D
x =-1,\frac{7}{10}x=−1,
10
7
​