Question

give 3 examples of quadratic equations written in standard form. identify the values of 1,b,and c in each equation.

Answer 1

1. 2x^2 - 10x -5 = 0 a=2x^2 b. -10x c. -5

2. x^2 + 4x - 21= 0 a=x^2 b. 4x c. -21

3. 2x^2+ 15x- 8= 0 a=2x^2 b. 15x c. -8

4. 4x^2 - 8x + 7= 0 a=4x^2 b. -8x c. 7

5. 4x^2 -24x - 9 = 0 a=4x^2 b. -24x c. -9

Answer 2

We have to write three examples of quadratic equations written in standard form, also we have to identify the values of a, b and c in each equation.

Quadratic equation :

• Every 2nd degree ( highest power of a variable in a polynomial) polynomial is specified as quadratic equation.
• Standard form of quadratic equation is given as; ax² + bx + c = 0
• Here, a is the coefficient of x² , b is coefficient of x and c is constant.

Three examples are,

1. x² + 2x + 1 = 0, here a = 1, b = 2 and c = 1
2. 5x² - 11x + 30 = 0, here a = 5, b = -11 and c = 30
3. √2x² + 4x + √3 = 0, here a = √2 , b = 4 and c = √3

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