4. -2xsquared+3x-7 when x=4

I will be happy to critique your work. Put 4 in for x and compute.

4|3x-7| when x= -2

To find the value of the expression -2x^2 + 3x - 7 when x = 4, you need to substitute 4 in place of x and simplify the expression.

Step 1: Start with the given expression: -2x^2 + 3x - 7.

Step 2: Substitute x = 4 into the expression:

-2(4)^2 + 3(4) - 7.

Step 3: Simplify each term of the expression:

-2(16) + 12 - 7.

Step 4: Calculate each term:

-32 + 12 - 7.

Step 5: Evaluate the expression:

-32 + 5 = -27.

Therefore, the value of -2x^2 + 3x - 7 when x = 4 is -27.