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| 1. |
If 2x ²+x+k is a zero of polynomial .find k |
| Answer» Since 3 is zero of f(x) =\xa02x2\xa0+ x + k, we havef(3) = 0{tex}\\Rightarrow {/tex}\xa02(3)2\xa0+ 3 + k = 0\xa0{tex}\\Rightarrow {/tex}\xa018 + 3 + k = 0{tex}\\Rightarrow {/tex}\xa021 + k = 0{tex}\\Rightarrow {/tex}\xa0k = -21 | |