Simplifying Integers ti 89 gives the wrong Answers?

Question

When trying to Simplify Using Expand I noticed sometimes the ti 89 gives me the wrong answer? Sometimes it adds the Square root instead of Subtracting them and Vis versa? Why does it do this is there any way to fix this problem? Why does it do that

Examples

1. (4/xy3)^-2

Why does it give me the answer of xy^6/16

Instead of x^2y^6/16?

2. x^3y^2/xy

Why Does it give me x^9y^6/xy^3

Instead of x^6y^3

3. 3(xy^-1)

Why Does it give me 3/xy

Instead of 3x/y

4. (4x^3) (3x^-1)^3/(4y^2)(6b^-1)

Why Does it Give me 162/y^3

Instead of 9/2y

5. (x^2y^2/xy)^2

Why does it give me x^4y^4/xy^2

Instead of m^2n^2

6. (-3/xy^3)^-3

Why Does it Give me -xy^9/27

Instead of - x^3y^9/27

7. (4x^3)(3x^-1)^3/(24y^3)(3y^-2)

Why Does it give me 27/2y^5

Instead of 3/2y

8. 3(3y)^2

Why does it Givce me 27y^2

Instead of 27y^6

9. (x&3y^3/xy)^2

Why does It give me x^6y^6/xy^2

Instead of x^4y^4

10. (3/xy^3)^-2

Why Does it Give me xy^6/9

Instead of X^2b^6/9

Answer 1

Favorite Answer

Most likely you are not entering the data correctly. Use parentheses so that the calculator knows precisely what you mean. The calculaltor follows a strict order of operations.