The value of expression 5x²-2 When x=3 is(a)-12 (b) 8 (c) 43 (d) 36

Solution

Given: 5x²−2 , x=3
We need to find the value of 5x²−2 at x=3
We will put 3 in place of x in the expression 5x²−2
Therefore, the value of the expression will be
5x²−2
=5(3)²−2
=5(3)−2
=45−2
=43