3 answers
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30y^2 - 42y + 5y - 28
= 30y^2 - 37y - 28
(6y-7) (5y+4)
= 30y^2 - 37y - 28
The correct product of (6y-7)(5y+4) is:
(6y)(5y) + (6y)(4) + (-7)(5y) + (-7)(4)
= 30y^2 + 24y - 35y - 28
= 30y^2 - 11y - 28
Therefore, the simplified product is 30y^2 - 11y - 28.