Question

If x= -2 is a root of the polynomial P(x) = -2XA
- 7x3 - 3x2-tx-10, then find the value of t.​

Answer 1

Answer:

_______

Given :

x = -2

Equation :

-2x^4 - 7x^3 - 3x^2 - tx - 10

the value of t =?

Solution :

• -2x^4 - 7x^3 - 3x^2 - tx - 10

° -2 × -2^4 - 7 × -2^3 - 3 × -2^2 - t × -2 - 10

° -2 × 16 - 7 × -8 - 3 × 4 + 2t - 10

° -32 + 56 - 12 + 2t - 10

° 24 - 22 + 2t

° 2 + 2t

° 2t = -2

° t = -1