Question

wha are the zeros of f(x)=x^3+8x^2+17x+10?
a: -2,1,5
b: 2,-1,-5
c: -2,1,-5
D:-2,-1,-5

Answer 1

\[x^3+8x^2+17x+10=x^3+x^2+7x^2+7x+10x+10 \\ =x^2(x+1)+7x(x+1)+10(x+1) \\ =(x+1)(x2+7x+10)=(x+1)(x+2)(x+5) \]

Answer 2

so D is the right answer

Answer 3

can u help me with some others?

Answer 4

factoring is a commen way to solve equations like this

Answer 5

what polynomial has roots of -5,-2 and 4?
a: x^3-x^2-22x+40
b:x^3+x^2-22x-40
c:x^3+3x^2-18x-40
d:x^3-3x2-18x+40

Answer 6

we can write (x+5)(x+2)(x-4)=0

Answer 7

is that right?

Answer 8

am i clear?

Answer 9

\[(x+5)(x+2)(x-4)=(x^2+7x+10)(x-4) \\ = x^3+7x^2+10x-4x^2-28x-40 \\ =x^3+3x^2-18x-40\]

Answer 10

C is the right one

Answer 11

THANK YOU

Answer 12

your welcome

Answer 13

d is the answer