1. Solve the equation x13 - 2x12 - x11 + 2x10 = 0 in the real number system.
A X=0 with multiplicity 10, x = -1, x = 1, x = 2
B x=0 with multiplicity 10. X = -1, x = 2 with multiplicity 2
Cx= -1, x = 1, x = 2
DX=0 with multiplicity 10, x= -1 X = 1 with multiplicity 2

b

step-by-step explanation:

this is a good question! i'll do some research and come back when i have the answer!

option (a)

step-by-step explanation:

step 1:   take 2 number whose product equal to 25..

and sum of those two number are -10

step: 2 for example here if we take 5,5 are the number,,

5*5=25

and

5+5=10

but we need -10

so if we take   -5,-5

so -5*-5=25

and -5+(-5)=-10

s0

come the equation

replace -10x by these number

like -5x -5x+25

take common

x(x-5)-5(x-5)=0

(x-5)(x-5)=0