Question

Evaluate the expression:2(x^2-1)+4y when x=4 and y=3

Answer 1

Explanation:

To evaluate the expression 2(x^2-1)+4y when x=4 and y=3, we substitute x=4 and y=3 into the expression and simplify:

2(x^2-1)+4y

= 2(4^2-1)+4(3) (substitute x=4 and y=3)

= 2(16-1)+12

= 2(15)+12

= 30+12

= 42

Therefore, when x=4 and y=3, the value of the expression 2(x^2-1)+4y is 42.