## Intermediate Algebra (12th Edition)

$10x^2-x-3$
Use special products to multiply the given expression, $(5x-3)(2x+1) .$ Using $(a+b)(c+d)=ac+ad+bc+bd$ or the FOIL Method, the product of the expression above is \begin{array}{l}\require{cancel} 5x(2x)+5x(1)-3(2x)-3(1) \\\\= 10x^2+5x-6x-3 \\\\= 10x^2-x-3 .\end{array}