Find a subset of the vectors that form a basis for the span of the vectors; then express each vector not in the basis as a linear combination of the basis vectors.
v1 = (1,1,-1,2), v2 = (1,-1,1,1), v3 = (3,-5,5,2), v4 = (6,2,-3,8), v5 = (8,2,-4,9)

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5

answer: 0.26

i used the calculator on google

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!