Question

find k if one zero of the quadratic polynomial X²- 2x + 3 is 2.

Answer 1

Heya !!!

It seems your question is wrong.

Right question :- X² - 2K + 3

Or (K)² - 2X + 3 OR X² - 2X + 3K

P(X) = X² - 2K +3

P(2) = (2)² - 2K + 3

=> 4 - 2K +3 = 0

=> -2K = -7

=> K = 7/2

Or,

P(X) = K² - 2X + 3

P(2) = K² - 2 × 2 + 3

=> K² - 4 + 3 = 0

=> K² = 7

=> K = ✓7

Or,

P(X) = X² -2X + 3K

P(2) = (2)² - 2 × 2 + 3K

=> 4 - 4 + 3K = 0

=> 3K = 0

=> K = 0/3 = 0

★ HOPE IT WILL HELP YOU ★

Answer 2

Your question needs a correction :

Correct equation : x² - 2kx + 3


=> x² - 2kx + 3 = 0

=> (2)² - 2(2)k + 3 = 0

=> 4 - 4k + 3 = 0

=> 7 - 4k

=> 7 = 4k

=> 7/4 = k