Questions: 8x + 7 - x^2 when x = 4

Solution Steps

To solve the given expression $8x + 7 - x^2$ when $x = 4$, we need to substitute $x$ with 4 and then evaluate the expression.

Given the expression $8x + 7 - x^2$, we substitute $x = 4$:

$$8(4) + 7 - (4)^2$$

First, calculate $8 \times 4$:

$$8 \times 4 = 32$$

Next, calculate $(4)^2$:

$$(4)^2 = 16$$

Now, substitute these values back into the expression:

$$32 + 7 - 16$$

Add and subtract the values:

$$32 + 7 = 39$$

$$39 - 16 = 23$$

Final Answer