Anil is 5 years older than Beena. The product of their present ages is 84. Form a quadratic in Beena's age and factorise to find Beena's age (in years).
Class 10Roots by FactorisationAlgebra — Quadratics
A8
B14
C7
D6
Step-by-Step Solution
Let Beena = x. Then x(x+5)=84, so x2+5x−84=0=(x+12)(x−7). Beena is 7 years old.
Answer: C) 7
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