Question

if x=1 , y=2 find the value of following expression. 1. 20 x to the power of 2 - y

Answer 1

20x^2 - y
=> 20 × 1^2 - 2
=> 20 × 1 - 2
=> 20 - 2
=> 18

Answer 2

Hey there!!

Let us see the equation first
it says ,

$20 {x}^{2} - y$
we are given ,
here , x = 1
and y = 2

putting it in

$20 {x}^{2} - y \\ = > 20 \times {1}^{2} - 2 \\ = > 20 - 2 \\ = > 18$
Hope this helps u !!