Evaluate the expression for the given value of the variable(s).
`3a^{2}-4b;a=-2,b=-3`
HINT: Remember that`(-2)^{2}=\left(-2\right)\left(-2\right)`
To evaluate the expression `3a^{2}-4b` when `a=-2` and `b=-3`, we substitute these values into the expression.
Substituting `a=-2` and `b=-3`, we get:
`3(-2)^{2}-4(-3)`
Now, let's simplify the expression:
`3(-2)^{2}-4(-3) = 3(4)+12`
Multiplying `3` by `4`, we get:
`12+12`
Adding `12` and `12`, we get:
`24`
Therefore, when `a=-2` and `b=-3`, the expression `3a^{2}-4b` evaluates to `24`.
To evaluate the expression `3a^{2}-4b` for the given values of `a = -2` and `b = -3`, we substitute these values into the expression:
`3(-2)^2 - 4(-3)`
First, let's simplify the expression inside the parentheses:
`3(4) + 12`
Next, calculate the products:
`12 + 12`
Finally, add the numbers:
`24`
Therefore, when `a = -2` and `b = -3`, the expression `3a^{2}-4b` evaluates to `24`.
To evaluate the expression `3a^2 - 4b` for the given values of the variables `a = -2` and `b = -3`, we substitute these values into the expression and calculate the result.
First, substitute `-2` for `a` and `-3` for `b` in the expression:
`3(-2)^2 - 4(-3)`
Now, let's simplify the expression step by step:
1. Evaluate `(-2)^2`, which means squaring `-2`:
`3(-2 * -2) - 4(-3)`
This simplifies to:
`3(4) - 4(-3)`
2. Multiply `3` by `4`:
`12 - 4(-3)`
3. Multiply `-4` by `-3`:
`12 + 12`
4. Add `12 + 12`:
`24`
Therefore, the value of the expression `3a^2 - 4b` when `a = -2` and `b = -3` is `24`.