When students take Algebra 1 matters. If high schoolers don’t pass the course by 9th grade, they’re unlikely to reach college-preparatory math in high school. There are too many courses to get ...

The landscape of homological algebra has evolved over the past half-century into a fundamental tool for the working mathematician. This book provides a unified account of homological algebra as it ...

Algebraic expressions can be expanded - multiplied by one or more terms. They may also be simplified – made shorter and simpler by collecting like terms. Multiply \(-3\) by \(-4\) using the rule ...