Which of the following is a factor of the polynomial ?
Given:
Polynomial:
Concept used:
We need to find two numbers that multiply to the constant term (-20) and add up to the coefficient of the middle term (-1).
Solution:
Constant term = -20
Coefficient of the middle term (x) = -1
Two numbers that multiply to -20 and add up to -1
−5×4 = −20
−5+4 = −1
The numbers -5 and 4 satisfy these conditions
These numbers to factor the polynomial:
Polynomial: are (x − 5) and (x + 4)
Thus, correct answer is (b ) x - 5
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90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishThe sum of squares of all the roots of the equation:
is:
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