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Does the rational expression contains square root sign?
Only if the term under the radical (square root sign) can be simplified to a rational expression. For example, √(4x2).
How are radical expression's simplified?
The details depend on the specific radical expression. Normally, you'll want to: * Avoid a perfect square under a radical sign. Take it out, by separating the radical into two parts. Example: root (x squared y) = root (x squared) x root (y) = x root (y). * Avoid a radical sign in the denominator. If you multiply numerator and denominator by the same square root, you get an expression in which there are roots in the numerator, but not in the denominator.
How do you find negative square root of 49?
You don't. If the negative sign is outside the radical, then you take the square root of the number and apply the negative. If the negative sign is inside the radical, you will have an imaginary number.
What is the expression b2 4ac under the radical sign in the quadratic formula?
The discriminant.
Why does the expression -a does not always represent a negative number?
* If "a" is positive, "-a" is negative.* If "a" is negative, "-a" is positive. * If "a" is zero, "-a" is zero. If you want to force a negative number, you can write -|a|, i.e., the negative of the absolute value.
What is this equation 90-23 plus a?
It is not an equation because it has no equality sign but it is an expression that can be simplified as: 67+a
What is the absolute value of 12?
12. Absolute value basically means to take off the negative sign of the expression, if there is a negative sign.
How do you symplify radical expressions?
Suppose the expression under the radical sign is y. Then the first step is to simplify y. Next find a term (or expression) x, such that y = x^2*z for some term (or expression) z. Then x*sqrt(z) is a simplification of sqrt(y).
What is the symbol used to represent a negative square root of a number?
Negative square root is -√Square root of negative one is i.
When rewriting an exponential expression with a negative exponent and a positive base to an expression containing only a positive exponent does the sign of the base change?
No.
What is the expression b2-4ac under the radical sign in the quadratic formula?
6
What is the name of a square root of a negative number?
I'm not quite sure, but when the number inside the radical (square root sign) is negative, there is a no real-number solution.
