A2 B2 = – A3 + B3 = A3 B3 = – Cautions: A2 B2 (A B)2 – – A3 + B3 (A + B)3 A3 B3 (A B)3 – – Ex e Factor 40c3 5d3 – Solving set each factor = 0 – Ex f s2 2s - 35 = 0 – Ex g 4x2 = 20x - 25 R.6 Rational Expressions and Equations Rational Expression , where Q(x)0 (polynomial fraction) – Zeroes in the denominator are to be avoided. (Try 50 on your calculator) Zeroes in the denominator are sometimes called *Ex a Find the values where is undefined Reducing/Cancelling Common Factors Common factors (multiplied) can be cancelled Common terms (added or subtracted) cannot be cancelled
A2 – B2 = A3 + B3 = A3 – B3 = Cautions: A2 – B2 (A – B)2 A3 + B3 (A + B)3 A3 – B3 (A – B)3 Ex e Factor 40c3 – 5d3 Solving – set each factor = 0 Ex f s2 – 2s - 35 = 0 Ex g 4x2 = 20x - 25 R.6 Rational Expressions and Equations Rational Expression – , where Q(x)0 (polynomial fraction) Zeroes in the denominator are to be avoided. (Try 50 on your calculator) Zeroes in the denominator are sometimes called *Ex a Find the values where is undefined Reducing/Cancelling Common Factors Common factors (multiplied) can be cancelled Common terms (added or subtracted) cannot be cancelled