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.