Question
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Answer
\(-12a^{2}\)
Solution
Calculate or simplify the expression \( -3a^2-9a^2 \).
Simplify the expression by following steps:
- step0: Solution:
\(-3a^{2}-9a^{2}\)
- step1: Collect like terms:
\(\left(-3-9\right)a^{2}\)
- step2: Subtract the numbers:
\(-12a^{2}\)
The simplified expression is \(-12a^{2}\).
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Simplify this solution Extra Insights
To simplify the expression \(-3a^{2} - 9a^{2}\), you need to combine like terms. Both terms are \(a^{2}\) terms, so you can add their coefficients together: \(-3 - 9 = -12\). Thus, the simplified expression is \(-12a^{2}\). So, \[ -3a^{2} - 9a^{2} = -12a^{2}. \]
