Algebra Examples

$(x^{2} + 7 x) + (2 x^{2} - 7 x)$

Step 1

Remove parentheses.

$x^{2} + 7 x + 2 x^{2} - 7 x$

Step 2

Combine the opposite terms in $x^{2} + 7 x + 2 x^{2} - 7 x$ .

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Step 2.1

Subtract $7 x$ from $7 x$ .

$x^{2} + 2 x^{2} + 0$

Step 2.2

Add $x^{2} + 2 x^{2}$ and $0$ .

$x^{2} + 2 x^{2}$

Step 3

Add $x^{2}$ and $2 x^{2}$ .

$3 x^{2}$