Question

Q3. Find the value of expression: 3k2 - 3k + 5, when k= (-2).​

Answer 1

$= 3 {( - 2)}^{2} - 3( - 2) + 5 \\ = 12 + 6 + 5 \\ = 12 + 11 \\ = 23$

Answer 2

Answer:

= 3k2-3k+5

= 3×(-2)×2-3×(-2)+5

= -12+6+5

= -1