The equation x^2+3x+2=0 has a root between
A 2.5 and 0.
B -1.5 and 0.
C 1.5 and 0.
D -0.5 and 0
The equation x^2+3x+2=0 has a root between
2006-11-27 11:10 pm
回答 (2)
2006-11-27 11:16 pm
✔ 最佳答案
x^2 + 3x + 2 = (x + 2)(x + 1) = 0Roots are -1 and -2.
Answer is B because -1 is between -1.5 and 0.
2006-11-27 11:15 pm
x^2+3x+2=0
(x + 2)(x+1) = 0
x = -2 or -1
therefore B is the correct ans
(x + 2)(x+1) = 0
x = -2 or -1
therefore B is the correct ans
收錄日期: 2021-04-12 19:03:07
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