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At which point will the zero of (u(x)=6x-18) lie on the number line?

Answer and explanation

Correct answer: (3)

The direct answer is option B, the point 3. A zero of a polynomial is the value of x that makes its value equal to zero. Here solve step by step: \(u(x)=6x-18\). Put the expression equal to zero: \(6x-18=0\). Add 18 to both sides: \(6x=18\). Divide by 6: \(x=3\). Therefore the zero is located at 3 on the number line. Option A, 2, gives \(6(2)-18=-6\), not zero. Option B, 3, gives \(18-18=0\), so it is correct. Option C, 6, gives \(36-18=18\), not zero. Option D, 18, gives a still larger nonzero value. Remember: to find a zero, set the polynomial equal to zero, not just one of its terms.

Related tags

PolynomialsNumber-LineZero-Of-PolynomialClass-10

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