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Rohan mother is 26years older than him . The product of their ages(in years ) 3 years from now will be 360. We would like to find Rohans present age |
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Answer» Let Rohan's age be x Therefore Rohan's mom's age is x+26 Now Roahn age after 3 yrs x+3 and his mothers age after three years x+29 Now we know (x+3)(x+29) = 360 x²+3x+29x+87 = 360 x²+32x+87=360 x²+32x=360-87 = 273 x(x+32)=273 After solving we get x=7 So, age of Rohan = 7 yrs The solution for how to get x is Take one factor of the equation x²+32x-273 = 0 First factorise .... Factors are x-7 and x+32 ...... So take any one factor and solve it and you will get two solutions of the quadratic equation...... X-7.....x=7 And x+32.....x=-32 Now put your logic age can't be in minus so x=7 is correct solution for this question...Hence solved |
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