Home Mathematics Y2 + 15y +56 = (y + 7)(y+)y +7y – 7y-8y – 8Find the number after y+ Y2 + 15y +56 = (y + 7)(y+)y +7y – 7y-8y – 8Find the number after y+Mathematics Destinyharris2586October 22, 20214 CommentsY2 + 15y +56 = (y + 7)(y+) y +7 y - 7 y-8 y - 8 Find the number after y+
y^2 + 15y + 56 factors to (y+7)(y+8)This is because 7+8 = 15 is the middle term and 7*8 = 56 is the last term. We can use the box method, FOIL rule, or distributive property to confirm we have the right factorization. I'll use the distributive rule(y+7)(y+8) = y(y+8) + 7(y+8)(y+7)(y+8) = y^2 + 8y + 7y + 56(y+7)(y+8) = y^2 + 15y + 56Reply
19y+63 is the correct answer
1) b. 8
2) b. 15
Do you need an explanation?
y^2 + 15y + 56 factors to (y+7)(y+8)
This is because 7+8 = 15 is the middle term and 7*8 = 56 is the last term. We can use the box method, FOIL rule, or distributive property to confirm we have the right factorization. I'll use the distributive rule
(y+7)(y+8) = y(y+8) + 7(y+8)
(y+7)(y+8) = y^2 + 8y + 7y + 56
(y+7)(y+8) = y^2 + 15y + 56
1-b-8
2-b-15
Step-by-step explanation: