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For example: 9x2-25 = (3x-5)(3x+5) but this only applies to negative expressions it wouldn't apply to 9x2+25

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Q: How the difference of two squares rule can be used to factorise an expression?
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Factor the expression x squared - eighty one?

This is a difference of two square, so you can apply the factoring rule for the difference of two squares.


How do you factor 4xsquared-36?

4x2 - 36 = (2x-6)(2x+6) A very useful general rule is this : - When an algebraic expression is the difference of two squares e.g. a2 - b2 then it factorises into (a - b) (a + b).


What is the rule for factoring the difference of squares?

a squared - b squared = (a+b)(a-b)


What is x squared minus nine?

It factors into (x-3)(x+3) as it follows the difference of squares rule. However, since you gave me an expression and not an equation, I cannot solve this expression beyond this point. If x^2-9=0. Then you can see that (x-3)=0 and (x+3)=0. Thus x=-3, 3.


What is the rule for a net of a cube?

it has got to have six squares


Why do we equate each factor to zero?

The product of a number of factors can be zero only if one of them is zero.So, if a given expression is zero, you factorise it and then, by the above rule, the statement is true if any one of the factors is zero. You therefore set each factor equal to zero to find the different possible solutions.


What is a rule for evaluating an expression?

the rule u follow is called order of operations


To rule with a rod of iron?

An expression of "firmness".


What is a rule or problem with no equal sign?

It is called an expression.


How do you you expression In concerning quotient rule on a computer?

ILY!!


Can a validation rule be created by using the expression builder?

Yes.


What is a rule that states the sequence to be used when evaluating expressions?

algerbic expression