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If you are using the X to mean multiply, then the answer is -18. Otherwise, if this is algebra, and the X is a variable, then numbers against a variable always means to multiply, so it would simplify to -18X.

Q: What is -9x2 simplified by expression?

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The property used to rewrite 9x2 + 9x3 is the Distributive Property. Using the Distributive Property the expression can be rewritten as 9x2 + 9x2 + 9x2 or 27x2.

3x2(x2 - 3)

This is an expression, not an equation. Expressions cannot be solved.

-5y2+3x+2y

The expression cannot be simplified.

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The property used to rewrite 9x2 + 9x3 is the Distributive Property. Using the Distributive Property the expression can be rewritten as 9x2 + 9x2 + 9x2 or 27x2.

3x2(x2 - 3)

(3x + y)(3x - y)

A simplified expression!

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

The discriminant polynomial is always [ b2 - 4ac ]. In any given expression, it's a number. In this expression, the number is zero, indicating that the expression is a square.

-5y2+3x+2y

This is an expression, not an equation. Expressions cannot be solved.

A simplified expression.

A simplified expression.

Which shows the expression below simplified?0.000054 Ã· (9 Ã— 10-4)

The expression cannot be simplified.