UPCAT

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• To solve equations with fractions, multiply both sides by the LCD
• The first step to solving an equation is to isolate the variable on one side
• If x^2 = y^2 then x=y or -x=-y
• The product of two numbers is equal to their sum if one number is twice the other.
• If x^2 = y^2, then x = ±y or x = −±y
• A quadratic equation can be solved using factoring or completing the square.
• In a quadratic function, if b≠0 then it has no real roots; otherwise, there are two real roots.
• If there are no variables left on one side, then it's already solved.
• When adding or subtracting fractions, make sure that they have the same denominator.
• A system of linear equations can be solved using matrix operations