Posted by **John** on Tuesday, April 20, 2010 at 2:24am.

Evaluate each expression for the given value(s) of the variable(s).

2x^2 - 3xy + 4y^2 for x=2, y=-1

My Answer:

(2(2^2)) - (3*2*-1) + (4(-1^2)) = 10

Text Book Answer: 18

Please help. Am I doing something wrong? I redid the expression 3 times and still got 10. But why textbook say it's 18?

Thank you.

## Answer This Question

## Related Questions

- Math PIZZAZZZ - how does a rodeo star get around?? well if you cant give me an ...
- Math! - 1) What is the value of 19 + 5a^4 + 3b^2 when a = 2 and b = -4? (this ...
- Math - Evaluate the expression for the given value. x = -2; y = 3; z = -1 -2x^2y...
- math (algebra) - explain how to evaluate an expression with a variable when you ...
- differential equations - the directions are to determine whether or not the ...
- Algebra - If anyone can check my work for me that would be greatly appreciated ...
- Advanced Math I - If a * b = a - 3b and a # b = 2a + 3b, evaluate the expression...
- MATH - Evaluate the expression for the for the given value of the variable...
- Math - Evaluate each expression for the given value of the variable 2*2 for x=3
- math - evaluate the expression for the given value of the variable p + 13 when p...

More Related Questions