Y2 + 15y +56 = (y + 7)(y+)y +7y – 7y-8y – 8Find the number after y+

Y2 + 15y +56 = (y + 7)(y+)
y +7
y - 7
y-8
y - 8

Find the number after y+

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This Post Has 4 Comments

  1. 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

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