Standard form of a quadratic equation is
Aax^2 + bx + c = 0 with a not 0
Bax + b = 0 with a not 0 only
Cax^3 + bx + c = 0 of degree three
Dax^2 + bx + c = a non-zero number
Answer & Solution
Correct answer: A. ax^2 + bx + c = 0 with a not 0
1. A quadratic is a polynomial equation of degree two.
2. Its general form has a, b, c with a not equal to zero.
3. If a = 0 the equation reduces to linear.
4. So the standard form is ax^2 + bx + c = 0.
_Source: Selina Concise Mathematics Class 10, Ch 5 Quadratic Equations (Mistral OCR'd PDF), section on standard form_
Related questions
If x² − 9 = 0, then x =Roots of x² − 5x + 6 = 0 are:Two times a number, added to the square of that number, gives 3. What could the number be?If 4x² + 12x + 9 = 0 and 2y² + 11y + 14 = 0, establish the relation between x and y.If x² − 6x + 9 = 0 and y² − 3y − 18 = 0, what is the relation between x and y?If x² − 15x + 56 = 0 and y = √64, establish the relation between x and y.The area of a rectangle is 60 sq cm and length exceeds breadth by 4 cm. Breadth isSolve by completing the square: x^2 + 6x + 5 = 0. Roots are