Question
Simplify:
$-4 x^2+\left\{\left(2 x^2-3\right)-\left(4-3 x^2\right)\right\}$
$-4 x^2+\left\{\left(2 x^2-3\right)-\left(4-3 x^2\right)\right\}$
✓
Answer
We have:
$-4 x^2+\left\{\left(2 x^2-3\right)-\left(4-3 x^2\right)\right\}$
$=-4 x^2+\left\{2 x^2-3-4+3 x^2\right\}$
[Removing grouping symbol]
$=-4 x^2+\left(5 x^2-7\right)$
$=-4 x^2+5 x^2-7$
(Removing grouping symbol {})
$=x^2-7$
$-4 x^2+\left\{\left(2 x^2-3\right)-\left(4-3 x^2\right)\right\}$
$=-4 x^2+\left\{2 x^2-3-4+3 x^2\right\}$
[Removing grouping symbol]
$=-4 x^2+\left(5 x^2-7\right)$
$=-4 x^2+5 x^2-7$
(Removing grouping symbol {})
$=x^2-7$
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