Question

if 1 and -2 are the zeros of polynomial x3-4x2 -7x+10 find the third zero

Answer 1

Answer:

5

hope this would help you !!!!!!!

Answer 2

Answer:

third zero=5

Step-by-step explanation:

$let \: \alpha \: and \: beta \: and \: \gamma \: be \: the \: roots \: of \: the \: equation$

$sum \: of \: roots = 1 - 2 + \gamma = - (coefficient \: of \:x {2}) \div coefficient \: of \: x {3}$

$1 - 2 + \gamma = - b \div a$

$\gamma - 1 = - ( - 4) \div 1$

$\gamma - 1 = 4$

$\gamma = 5$