Question

x^4-7x^3-12x^2+176x-320
I have to give the exact values list multiple zeros as necessary so i just need to know the probably 4 zeros of this prob

Answer 1

x=4 is a zero

Answer 2

so x^4-7x^3-12x^2+176x-320=(x-4)(x^3-3x-24x+80)=0

Answer 3

there is more then 1 zero isnt there

Answer 4

(x-4)(x^3-3x^2-24x+80)=0*

Answer 5

yes there are 3 more

Answer 6

nice!

Answer 7

x=4 is again another zero

Answer 8

(x-4)(x-4)(x^2+x-20)=0

Answer 9

now we have 2 more to find

Answer 10

+5 - 4

Answer 11

-5,4

Answer 12

oo ya i didnt factor them to 0

Answer 13

because x^2+x-20=(x+5)(x-4)

Answer 14

thank you !

Answer 15

so 4 multiplicity 3 and 5

Answer 16

oops -5

Answer 17

np