TisITheStudent TisITheStudent 30-03-2017 Mathematics contestada Fill in the blank spaces y2 + 15y + 56 = (y + 7)(y +_) a. –8 b. 8 c. –7 d. 7 z2 + 9z – 90 = (z – 6)(z +mc005-1.jpg) a. –15 b. 15 c. –9 d. 90