Question

If one of the zeros of the quadratic polynomial (k-1)x+ x + 1 is -3 then find the value of k

Answer 1

Answer:1/3

Step-by-step explanation:

x=-3

substituting it in eq.

(k-1){-3}-3+1=0

-3k +3 -3 +1=0

k=1/3

Answer 2

Step-by-step explanation:

GIVEN:-)

→ One zeros of quadratic polynomial = -3.

→ Quadratic polynomial = ( k - 1 )x² + kx + 1.

Solution:-

→ P(x) = ( k -1 )x² + kx + 1 = 0.

→ p(-3) = ( k - 1 )(-3)² + k(-3) + 1 = 0.

=> ( k - 1 ) × 9 -3k + 1 = 0.

=> 9k - 9 -3k + 1 = 0.

=> 6k - 8 = 0.

=> 6k = 8.

$\large \boxed{=> k = \frac{8}{6} = \frac{4}{3} }$

Hence, the value of ‘k’ is founded . ... ..