To simplify the expression \((a^2 - 11) + (3a^2 - 4a + 6)\), we can combine like terms.
First, we will distribute and combine all the terms:
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The expression consists of two parts:
- From the first part: \(a^2 - 11\)
- From the second part: \(3a^2 - 4a + 6\)
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Now, we can put the terms together: \[ (a^2 + 3a^2) + (-4a) + (-11 + 6) \]
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Combine the like terms:
- For \(a^2\) terms: \(a^2 + 3a^2 = 4a^2\)
- The \(a\) term is \(-4a\)
- The constant terms: \(-11 + 6 = -5\)
Putting it all together, we get: \[ 4a^2 - 4a - 5 \]
So, the simplified expression is: \[ \boxed{4a^2 - 4a - 5} \]