Chapter 8 - Polynomials and Factoring - 8-5 Factoring X(squared) + bx + c - Practice and Problem-Solving Exercises - Page 503: 13

$(v+10)(v+2)$

$v^2+12v+20=(v+10)(v+\underset\uparrow?)$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ $added to 10, must equal 12 $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ $multiplied by 10, must equal 20 Let y be ?. $y+10=12$ $y+10-10=12-10$ $y=2$ $10y=20$ $10y\div10=20\div10$ $y=2$