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B
1
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C
27
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D
−72
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Solution
The correct option is D−72 The given equation is 2x2+5x−7=0
Here the sum of the coefficients is 2+5−7=0
If a+b+c=0 for an equation ax2+bx+c=0, then the roots are 1 and ca. ⇒ the roots of this equation are 1 and −72.