a = 4, b = -21, c = -18
to keep from getting "mixed up", evaluate the discriminant first ...
b<sup>2</sup> - 4ac = (-21)<sup>2</sup> - 4(4)(-18) = 729
sqrt(729) = 27
x = (21 +/- 27)/8
x = -3/4, x = 6
since the discriminant is a perfect square, the original quadratic will factor ...
4x<sup>2</sup> - 21x - 18 = 0
(4x + 3)(x - 6) = 0
x = -3/4, x = 6
Answer:
I think it is -2
Step-by-step explanation:
I think but I do not know
ok i think your answer will be from least to greatest it would be this 3 1/5, 3.1, 3.5, 4.2
Hope i helped let me know if i got it right if not i am very sorry.
Answer: [D]: y = -3x + 2 .
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