Example 1
evaluate the expression (5 + 7) + 2x3- (8 + 1).
(5 + 7) + 2 x 3 – (8 + 1) = 12 - 2x3- (8 + 1) add inside the left parentheses.
= 12 - 2 x 3-9 add inside the remaining parentheses
= 6 x 3 - 9
divide.
= 18 - 9
multiply
subtract.

the first one

step-by-step explanation:

just id the test.

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!