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(1) What should be added to 3x2 – 5x + 9 to get x2 – 2x – 3 ?
Soln. Let, 3x2 – 5x + 9 + p(x) = x2 – 2x – 3
☼ Results on Rational Expressions :
(i) Sum ( or difference or product ) of two rational expressions is a rational expression.
(ii) Rational expressions satisfies commutative, associative and distributive laws.
(iii) 0 …
☼ Degree and Coefficient : The highest index of the given polynomial is called the degree of the polynomial and the coefficient of highest index term is called the coefficient of the given polynomial.
e.g….
(4) Discuss the nature of the roots of the following equations :
(i) 4x2 + 15x – 25 = 0
(ii) 4x2 – 12x + 1 = 0
(iii) 9x2 + 6x + 1 = …
Examples :
(1) Solve the equations :
(i) 3x2 + 5x + 2 = 0
(ii) 3x2 – 5x + 2 = 0
(iii) 3x2 + 5x – 2 = 0