  # P(x)=x^2 + 2(√2)x – 6 Find the Zero of the Polynomial and Verify between Zero and Coefficients

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Updated on: October 17th, 2023 P(x)=x2 + 2(√2)x – 6 find the zero of the polynomial and verify between zero and coefficients

Here are the steps to find the zeros of the quadratic polynomial P(x) = x2 + 2(√2)x – 6

• We can find out the zeros by using quadratic formula(x = (-b ± √(b2 – 4ac)) / (2a)) or by the method shown below.
• On simplifying by either of the methods, we will get the zeros.
• To verify the relationship between the zeros and the coefficients we can use Vieta’s formulas. Let us explore more in the coming section.

Table of content ## P(x)=x2 + 2(√2)x – 6 Find the Zero of the Polynomial and Verify between Zero and Coefficients

Solution:

Let’s solve the quadratic polynomial P(x) = x2 + 2(√2)x – 6 using a different method, factoring.

To factor the quadratic polynomial, we need to find two numbers that multiply to give -6 (the coefficient of the constant term) and add up to 2(√2) (the coefficient of the linear term).

The two numbers that meet these conditions are √6 and -√6. Therefore, we can rewrite the polynomial as:

P(x) = (x + √6)(x – √6)

Setting this expression equal to zero, we have:

(x + √6)(x – √6) = 0

Now we can apply the zero product property, which states that if a product of factors is equal to zero, then at least one of the factors must be zero.

Setting each factor equal to zero, we get:

x + √6 = 0 –> x = -√6

x – √6 = 0 –> x = √6

Therefore, the zeros of the quadratic polynomial P(x) = x2 + 2(√2)x – 6 are x = -√6 and x = √6.

Now, let’s verify the relationship between the zeros and the coefficients using Vieta’s formulas:

The sum of the zeros is equal to the negation of the coefficient of the linear term divided by the coefficient of the quadratic term:

Sum of zeros = -2(√2) / 1 = -2√2

The product of the zeros is equal to the constant term divided by the coefficient of the quadratic term:

Product of zeros = -6 / 1 = -6

Indeed, the sum of the zeros, -2√2, matches the coefficient of the linear term, and the product of the zeros, -6, matches the constant term. Therefore, the relationship between the zeros and the coefficients is verified. GradeStack Learning Pvt. Ltd.Windsor IT Park, Tower - A, 2nd Floor, Sector 125, Noida, Uttar Pradesh 201303 help@byjusexamprep.com