To simplify the expression \((14x + 6y) + (5x + 12y)\), we will first combine the like terms.
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Combine the \(x\) terms:
- \(14x + 5x = 19x\)
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Combine the \(y\) terms:
- \(6y + 12y = 18y\)
Now, putting it all together, we have: \[ 19x + 18y \]
Now, if you want to multiply the entire expression by \(x + y\), distribute it as follows:
\[ (19x + 18y)(x + y) \]
This gives:
- \(19x \cdot x = 19x^2\)
- \(19x \cdot y = 19xy\)
- \(18y \cdot x = 18xy\)
- \(18y \cdot y = 18y^2\)
Now combine the terms: \[ 19x^2 + (19xy + 18xy) + 18y^2 = 19x^2 + 37xy + 18y^2 \]
Thus, the final answer after simplifying is: \[ 19x^2 + 37xy + 18y^2 \]
To summarize, the coefficients are:
- For \(x^2\): 19
- For \(xy\): 37
- For \(y^2\): 18