for what value of k,3a zero of polynomal 2x+x+k
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2x² + x + k
2x² + x + k = 0
∴2(3)² + 3 + k = 0 (Putting x = 3)
∴2*9 + 3 + k = 0
∴18 + 3 + k = 0
∴21 + k = 0
∴k = -21
Thus, for k = -21, 3 is a zero of the polynomial.
2x² + x + k = 0
∴2(3)² + 3 + k = 0 (Putting x = 3)
∴2*9 + 3 + k = 0
∴18 + 3 + k = 0
∴21 + k = 0
∴k = -21
Thus, for k = -21, 3 is a zero of the polynomial.
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