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3 years ago

A quadratic polynomial which has zeros at -7 and 5. ?

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

4 0

Answer:

x^2 + 2x - 35

Step-by-step explanation:

Sum of zeros

= - 7 + 5

= - 2

Product of zeros

= - 7 x 5

= - 35

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

= x^2 - ( - 2 ) x + ( - 35 )

= x^2 + 2x - 35

The Quadratic polynomial is x^2 + 2x - 35.

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Possible part of the question that appear missing are;

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Required:

The number of extra hours it will take her to reach her destination

Solution:

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Which gives;

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D.
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Make r the subject

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Hence, the resulting equating for r is:

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