Question

find the value of 2x^2 +x -1 , when x=2.
Answer - 2x^2 + x- 1
2(2)^2 +2 - 1
2 × 4 + 2 - 1
8+ 2 - 1
10 - 1 = 9.​

Answer 1

Answer:

9

Step-by-step explanation:

2x^2+x -1

=2*2^2+2 -1

=8+1

=9