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We know that, for a quadratic equation ax2 + bx + c, Sum of its roots = -b/a and product of roots = c/a For 2x2 + 3x – 9 = 0, => x1 + x2 = -3/2 and x1x2 = -9/2 For the equation whose roots are 1/x1 and 1/x2, Sum of roots = (1/x1) + (1/x2) = (x1 + x2)/x1x2 = -3/-9 = 1/3 Product of roots = 1/(x1x2) = -2/9 ∴ the quadratic equation = x2 - 1/3x - 2/9 = 9x2 - 3x - 2 = 0
Slap on the Wrist
Fill in the blank given below using the correct idiom.
Sarah's calm demeanor during the crisis put her _______________, as she effectively gu...
Select the most appropriate meaning of the given idiom.
snug as a bug in a rug
"The politician tried to pass the buck when questioned about the scandal."
The fact that the guard was a thin man considerably shorter than Walker made the task seem like a catwalk .
In each question below, a sentence is given with an idiom/phrase printed in bold type. That part may contain a grammatical error. Each sentence is follo...
Good Samaritan
Choose the option which best expresses the meaning of the idiom/phrase in bold in the sentence.
Despite several setbacks, the young entrepreneur de...
Widely known and esteemed
Burglars broke into our neighbour’s house last night.