Question

Please koi solve krdo ​

Answer 1

Answer:

-9

Explanation:

${x}^{3} + 2 {x}^{2} + kx + 7 = (x - 3) \times q + 25 \\ {x}^{3} + 2 {x}^{2} + kx + 7 - 25 = (x - 3) \times q \\ {x}^{3} + 2 {x}^{2} + kx - 18 = (x - 3) \times q \\ q = ({x}^{3} + 2 {x}^{2} + kx - 18) \div (x - 3) \\ x - 3 = 0 \\ x = 3 \\ p(3) = {3}^{3} + 2 {x}^{2} + 3k - 18 = 0 \\ 27 + 18 + 3k - 18 = 0 \\ 27 + 3k = 0 \\ 3k = - 27 \\ k = - 27 \div 3 \\ k = - 9$