Question

Tinky Winky is 2 years younger than Laa Laa. If the product of Tinky's and Laa Laa's ages is equal to 1 less than 5 times the sum of their ages, how old is Tinky?

Answer 1

Answer:

Solution:-

Let

Tinky's age=x

Laa's age=x+2

According to the question

$\qquad\quad {:}\longmapsto\sf 5 (x+x+2)-1=x (x+2)$

$\qquad\quad {:}\longmapsto\sf 5(2x+2)-1=x^2+2x$

$\qquad\quad {:}\longmapsto\sf 10x+5-1=x^2+2x$

$\qquad\quad {:}\longmapsto\sf 10x+4=x^2+2x$

$\qquad\quad {:}\longmapsto\sf 10x-2x+4=x^2$

$\qquad\quad {:}\longmapsto\sf x^2=8x+4$

$\qquad\quad {:}\longmapsto\sf x^2-8x-4=0$