Question

please do fast it's urgent please it's my holidays homework ​

Answer 1

Answer:

(I)

Step-by-step explanation:

x²-2x-8

x²-(4-2) x-8

x²-4x+2x-8

x(x-4) +2(x-4)

(x+2) (x-4)

x+2=0 , x= -2

x-4=0 , x=4

zeroes are -2and 4

$\alpha = - 2 and \beta = 4$

$\alpha + \beta = - cofficient \: of \: x \div cofficient \: of \: x {}^{2}$

-2+4=-(-2)

2=2 verified

$\alpha \times \beta = constant \: term \div coefficient \: of \: x {}^{2}$

(-2) ×4= -8÷1

-8=-8

verified.

Remaining all the parts you should have to try yourself. I hope you like the answer.