for what value of knowledge is 3 a root of the equation 2x^2+x+k=0?
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The root of the given equation in 3.
That is ,x=3
2x^2+x+k=0. ........Given equation
2×3×3+3+k=0
18+3+k=0
21+k=0
k= -21
Hence , k= -21
That is ,x=3
2x^2+x+k=0. ........Given equation
2×3×3+3+k=0
18+3+k=0
21+k=0
k= -21
Hence , k= -21
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