Factor. z^2 - 3z - 4 ____

Identify Correct Numbers: The numbers that work are -4 and +1 because -4 * 1 = -4 and -4 + 1 = -3. Write the expression as (z - 4)(z + 1).Use FOIL Method: Check the factoring by using the FOIL method (First, Outer, Inner, Last) to multiply the two binomials. (z - 4)(z + 1) = z^2 + z - 4z - 4 = z^2 - 3z - 4.

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Factor. $\newline$ $z^2 - 3z - 4$

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Q. Factor.

\newline

z^2 - 3z - 4

Identify Correct Numbers: The numbers that work are $-4$ and $+1$ because $-4 \times 1 = -4$ and $-4 + 1 = -3$ . Write the expression as $(z - 4)(z + 1)$ .
Use FOIL Method: Check the factoring by using the FOIL method (First, Outer, Inner, Last) to multiply the two binomials. $\newline$ $(z - 4)(z + 1) = z^2 + z - 4z - 4 = z^2 - 3z - 4$ .