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单选题
Solve the quadratic equation x2-5x-14=0.
A
x=7 and x=-2
B
x=-7 and x=-2
C
x=-7 and x=2
D
x=7 and x=2
E
x=-7 and x=2
参考答案
参考解析
解析：
Factor the expression in x2-5x-14=0 to get(x-7)(x+2)=0. So, either(x-7)=0 or(x+2)=0. Therefore, x=7 or x=-2.
Factor the expression in x2-5x-14=0 to get(x-7)(x+2)=0. So, either(x-7)=0 or(x+2)=0. Therefore, x=7 or x=-2.
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