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Quadratic polynomial which has zeros at 7 and 3?

Sagot :

Answer:

x^2 - 10x + 21

Step-by-step explanation:

Sum of zeros

= 7 + 3

= 10

Product of zeros

= 7 x 3

= 21

x^2 - ( sum of zeros )x + product of zeros

= x^2 - 10x + 21

The Quadratic polynomial is x^2 - 10x + 21.

if the zeroes of a quadratic polynomial are a and b, then the polynomial can be written as :

[tex] \boxed{{x}^{2} - (a + b)x + ab}[/tex]

So,

[tex] \hookrightarrow \: {x}^{2} - (7 + 3)x + (7 \times 3)[/tex]

[tex]\hookrightarrow \: {x}^{2} - 10x + 21[/tex]