Algebra
Equations, expressions, slope and the steps people skip.
- Subtracting before dividing in two-step equationsUndo the added number first, then divide by the coefficient.
- Dividing both sides to isolate xDivide the whole of each side by the coefficient on x.
- Distributing a negative signA minus in front of brackets changes the sign of every term inside.
- Combining like termsOnly terms with the same variable and power can be added together.
- Solving with variables on both sidesMove all x terms to one side before solving.
- Finding the slope between two pointsSlope is change in y over change in x, subtracted in the same order.
- Reading slope-intercept formIn y = mx + b, m is the slope and b is where the line crosses the y-axis.
- Graphing a line from its equationPlot the intercept, then use rise over run to find the next point.
- Flipping the inequality when dividing by a negativeMultiplying or dividing by a negative reverses the inequality.
- Factoring quadratics into two bracketsFind two numbers that multiply to c and add to b.
- Solving quadratics with the zero-product ruleSet the equation to zero, factor, then set each factor to zero.
- Exponent rules for multiplying powersSame base, multiplying: add the exponents.
- Solving a system by substitutionSolve one equation for a variable and substitute it into the other.
Save this as a miss — practice it before your test
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Save this as a miss — practice it before your test