Mathematics
NULL
Medium
Question
If the roots of a quadratic equation are 20 and −7, then find the equation.
A
x² + 13x − 140 = 0
B
x² − 13x + 140 = 0
C
x² − 13x − 140 = 0
✓ Official correct answer
D
x² + 13x + 140 = 0
Community credibility
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A
x² + 13x − 140 = 0
No member explanations yet for this option.
B
x² − 13x + 140 = 0
No member explanations yet for this option.
C
x² − 13x − 140 = 0
No member explanations yet for this option.
D
x² + 13x + 140 = 0
No member explanations yet for this option.
Explanation
x² − (sum)x + product = x² − 13x − 140 = 0. So x² − 13x − 140 = 0.