`(-9) x 6 + (-9) x 4 = ? `

Options

A. `-90`
B. 90
C. `-18
D. `18`

Answer

To solve the expression \((-9) \times 6 + (-9) \times 4\), we will follow these steps:

### Step 1: Calculate \((-9) \times 6\)
\[ (-9) \times 6 = -54 \]
**Hint:** When multiplying a negative number by a positive number, the result is negative.

### Step 2: Calculate \((-9) \times 4\)
\[ (-9) \times 4 = -36 \]
**Hint:** Again, multiplying a negative number by a positive number results in a negative number.

### Step 3: Combine the results from Step 1 and Step 2
Now we will add the two results together:
\[ -54 + (-36) \]
This can also be written as:
\[ -54 - 36 \]
**Hint:** Adding a negative number is the same as subtracting its absolute value.

### Step 4: Perform the addition
Now we perform the subtraction:
\[ -54 - 36 = -90 \]
**Hint:** When both numbers are negative, you add their absolute values and keep the negative sign.

### Final Answer
The final result of the expression \((-9) \times 6 + (-9) \times 4\) is:
\[ \boxed{-90} \]