Find the product:(3y − 8) × (5y − 1)
By horizontal method:
$(3 y-8) \times(5 y-1)$
$=3 y(5 y-1)-8(5 y-1)$
$=15 y^{2}-3 y-40 y+8$
$=15 y^{2}-43 y+8$
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