SAT Math 12: Quadratics Part 9 (How zeros relate to factors, divisibility, & remainders)

In Quadratics Part 9, we wrap up our coverage of zeros by discussing how they relate to the concepts of factors, divisibility, & remainders in the context of polynomials. NOTE: All info in this video applies to the DIGITAL SAT, but there are some points to keep in mind. Calculators are now allowed on ALL math questions (a Desmos calculator is built in to the testing app) and the “grid ins” (self-produced response questions) now allow for a wider range of answers (up to 5 digits, negative numbers, etc). Regarding calculator use, we recommend students continue to attempt the “no calculator” questions in our manual without a calculator, but if they feel they must use one, they certainly can. As for the grid-ins, those in our manual abide by the paper test rules, not the DSAT ones.

SECTIONS:
12.3 Zeros (continued)
-How zeros relate to factors, divisibility, & remainders
PAGES: 142-145
EXAMPLES: 18-24
CONTENTS:
00:00 - Introduction
00:33 - Converting between zeros & factors
02:05 - Example 18
05:43 - SM.143
05:50 - Example 19
07:48 - Zeros, factors, & divisibility
07:57 - The "Chain": zeros-factors-divisibility
11:04 - Example 20
16:26 - SM.144
17:58 - Example 21
20:17 - Polynomial Remainder Theorem
22:00 - Example 22
26:59 - SM.145
27:06 - Example 23
30:10 - Example 24