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If alpha and beta the zeroes of the polynomial 4x² 4x 1 , then form a quadratic polynomial whose zeroes are 2alpha and 2 beta?
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If alpha and beta the zeroes of the polynomial 4x² 4x 1 , then form a ...
Forming a Quadratic Polynomial with Zeroes 2α and 2β


Finding the Zeroes of the Given Polynomial


To find the zeroes of the polynomial 4x² + 4x + 1, we can use the quadratic formula:

x = (-b ± √(b² - 4ac)) / 2a

Plugging in the values of a, b, and c from our polynomial, we get:

x = (-4 ± √(16 - 16)) / 8

Simplifying, we get:

x = (-4 ± 1) / 8

Which gives us the two zeroes: α = -1/2 and β = -1/2.

Finding the Zeroes of the Desired Quadratic Polynomial


We want to find a quadratic polynomial with zeroes 2α and 2β. To do this, we can use the fact that if a polynomial has zeroes α and β, then it can be written as:

P(x) = (x - α)(x - β)

Thus, a quadratic polynomial with zeroes 2α and 2β can be written as:

Q(x) = (x - 2α)(x - 2β)

Plugging in the Values of α and β


We already know the values of α and β from the given polynomial. Plugging these values into the expression for Q(x), we get:

Q(x) = (x - 2(-1/2))(x - 2(-1/2))

Simplifying, we get:

Q(x) = (x + 1)(x + 1)

Which is the desired quadratic polynomial.
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