The ages of two children are 11 and 8 years. In how many years' time will the product of their ages be 208?
4 answers
(11+x) (8+x)=208. X^2+19x-120=0. Factorise so x=5 or x=-24. So the value that satisfies is 5.so it is after 5 years
(11+x)(8+x)=208 by expanding you get 11(8+x)+x(8+x)=208 by simplifyig this you get x^2+19x+88=208 bring 88 to the rhs you have x^2+19x=120 factorise you have x=5 or x=-24 since age cant be negative the answer is 5
the sum of the age of two sisters is 19 .in 5 years time the product of their ages will be 208.what are their age
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