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Chapter 6
Quadratic Equations
Question | Answer |
---|---|
What is the quadratic expression in the variable x? | ax^2 + bx + c is the general quadratic expression in the variable x. |
What is the quadratic equation in the variable x? | ax^2 + bx + c = 0 is the general quadratic equation in the variable x. |
What is the binomial square theorem? | For all real numbers x and y, (x+y)^2 = x^2+2xy+y^2and (x-y)^2 = x^2 - 2xy + y^2 |
What is the Absolute Value-Square Root Theorem? | For all real numbers x, square root of x^2 = absloute value of x |
What is the Quadratic Formula Theorem? | x=-b+- the square root of b^2 - 4ac all over 2a. |
What is a complex number? | A number in the form a + i where a and b are real numbers and i = the square root of -1; a is called the real part and b is called the imaginary part. |