Algebra Examples

$x^{2} - 2 x - 6 - - 6 x + 5$

Step 1

Replace all occurrences of $-$ $-$ with a single $+$ . Two consecutive minus signs have the same mathematical meaning as a single plus sign because $- 1 \cdot - 1 = 1$

$x^{2} - 2 x - 6 + 6 x + 5$

Step 2

Add $- 2 x$ and $6 x$ .

$x^{2} + 4 x - 6 + 5$

Step 3

Add $- 6$ and $5$ .

$x^{2} + 4 x - 1$