Topic 3 0.0 / 5 ? MathematicsEquations and inequalitiesASEdexcel Created by: Jemma1494Created on: 02-06-21 15:04 Elimination Subtract or add two equations to cancel out one variable then rearrange to solve 1 of 5 Substitution If both equations equal the same thing or on can replace a variable in the other then the combined equation can be rearranged and solved 2 of 5 Finding intersect points Use the two equations as simultaneous to find intersect points Discriminant can be used if quadratics are involved 3 of 5 Symbol for inequalities on a number line Open circle = ≤ or ≥ Closed circle = < or > 4 of 5 Regions on graphs Dotted line = < or > Solid line = ≤ or ≥ 5 of 5
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