Question

If x=3 and y=5 work out the value of

a)4x-2y

Answer 1

a)2

b)93

substitute the values of x and y

a)4x-2y

=> 4x3-2x5

=12-10

=2

b)2x^2+3y^2

=> 2x3^2 + 3x5^2

= 2x9+3x25

=18+75

=93