## College Algebra (6th Edition)

$x^{2}-7x+4$, for $x=8$, substitute 8 for each 'x' $8^{2}-7\times8+4$, using order of operations, complete exponents first $64-7\times8+4$, then multiplication and division in order left to right $64-56+4$, then addition and subtraction in order left to right $8+4$, any remaining addition and subtraction left to right $12$