If the two roots of 2x^2+ax+18=0 are equal, then the value of a is-
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Answered by
8
2x²+ax+18=0
D=b²-4ac
(a)²-4(2)(18)=0
a²-144=0
a²=144
a=12
D=b²-4ac
(a)²-4(2)(18)=0
a²-144=0
a²=144
a=12
Answered by
4
you can take this formula bsquare -4ac divide by 2a
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