Question

5x2 + {(–3x2 – 5) – (5 + 9x2)}
Simplify​

Answer 1

Step-by-step explanation:

$5x2 + {(–3x2 – 5) – (5 + 9x2)} \\ = 5 {x}^{2} - 3 {x}^{2} - 5 - 5 - 9 {x}^{2} \\ = 5 {x}^{2} - 12 {x}^{2} - 10 \\ = - 7 {x}^{2} - 10$

Answer 2

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