Question

What is the value of the expression 4x+y2y−x when x = 2 and y = 4?

Answer 1

$4x+y^2y-x$

simplify used $a^n\cdot a^m=a^{n+m}$

$4x+y^2y-x=3x+y^3$

substitute the values of x = 2 and y = 4 to the expression:

$3\cdot2+4^3=6+64=70$