Q: How do you solve this problem what is the value of the expression 2x squared plus 3xy - 4y squared when x equals 2 and Y equals 4?

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Solve this problem -x squared -40x- 80 =0

Without an "equals" word or sign somewhere, there is nothing to solve.You only have an expression, not an equation.

The question contains an expression, not an equation or inequality. There is nothing to solve in an expression.

meaning to evaluate the variable in an expression. An algebraic expression is also a problem that contains no equals sign and you don't solve it, rather you simplify it.It means to solve something.

-91

The question contains an expression but not an equation. You cannot solve an expression.

5.

If r-squared = theta then r = Â±sqrt(theta)

12 + 5 equals...

root 7

x = 2

h = +11 and/or -11

1 - 2 sin2(14 deg) is an expression, not an equation. An expression cannot be solved.

You don't, unless you know either the value of x or what the expression equals.

Solve using the quadratic formula

If x squared -10 = 0 then x = the square root of 10

To solve for x, we'd have to know what this expression equals.

.138

(x-5)(x+3)

(x-3)(x-2)

X=1

The question contains an expression but not an equation. An expression cannot be solved.

The question contains an expression, not an equation nor inequality. An expression cannot have a solution.

Take 3 and substitute into the expression given to you but not mentioned in the question here and evaluate the expression. "Sub and Solve" I say.

The information you provided in your question does not include an =. Therefore it is not an equation; it is an expression

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