Examveda
Examveda

If x * y = (x + 3)2 (y - 1), then the value of 5 * 4 is?

A. 192

B. 182

C. 180

D. 172

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & x*y = {\left( {x + 3} \right)^2}\left( {y - 1} \right) \cr & \Leftrightarrow 5*4 = {\left( {5 + 3} \right)^2}\left( {4 - 1} \right) \cr & \Leftrightarrow 5*4 = 64 \times 3 \cr & \Leftrightarrow 5*4 = 192 \cr} $$

This Question Belongs to Arithmetic Ability >> Algebra

Join The Discussion

Related Questions on Algebra