Question

Find a if 2 is the zero of polynomial
x2-5x+2​

Answer 1

quadratic equation formula => -b+- √ b2 - 4.a.c/2.a

b = -5

a = 1

c = 2

$\huge\underline{\mathbb\red{❥︎A}\green{N}\mathbb\blue{S}\purple{W}\mathbb\orange{E}\pink{R}}\:$

________________________________

=> -(-5)+-√{( 5)2- 4 . 1. 2 / 2.1

=> 5+-√{ 25- 8} / 2

=> 5+- √ 13 / 2

=> 5+ √13 / 2 and 5 - √13 / 2. ans.

=> +- = one time plus and one time minus