The area (in square feet) of the school sign can be represented by $15x^2-x-2$ . a. Write an expression that represents the length of the sign. length: ft Question 2 b. Describe two ways to find the area of the sign when $x=3$ . 1. Substitute for into the expression for the area $15x^2-x-2$ , then simplify. 2. Substitute for into the expressions for the length $\text{(}$ $\text{)}$ and width $\left(3x+1\right)$ , simplify each, then multiply these two numbers.

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answer

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step-by-step explanation:

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.

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