an equation has an equals sign.
If it doesn't have an equal sign, then it's an expression, not an equation. The expression 7x2x is quadratic, because it equals 14x², and something is quadratic if it contains the squared exponent ².
Only when the discriminant of the quadratic expression is equal to or greater than zero
You substitute the value of the variable into the quadratic equation and evaluate the expression.
Look in an advanced maths book.Improved answer:-If the discriminant of the quadratic expression is less than zero then it's not possible to factor it.
No. It is a sequence for which the rule is a quadratic expression.
It is used to solve quadratic equations that cannot be factored. Usually you would factor a quadratic equation, identify the critical values and solve, but when you cannot factor you utilize the quadratic equation.
No
an equation has an equals sign.
A quadratic expression is an expression which is written in the form ax2+bx+c, where a, b, and c represent constants, x represents a variable, and a is not equal to 0.
x2 + 3x + 4 This is quadratic because the highest exponent of x is 2, and it is an expression because there is no equals sign.
If it doesn't have an equal sign, then it's an expression, not an equation. The expression 7x2x is quadratic, because it equals 14x², and something is quadratic if it contains the squared exponent ².
b2-4ac
You will apply them when solving quadratic equations in which the quadratic expression cannot be factorised.
You substitute the value of the variable into the quadratic equation and evaluate the expression.
Only when the discriminant of the quadratic expression is equal to or greater than zero
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