What is (3x^2+6x)+(4x^2-8x) ?

The solution to (3x^2+6x)+(4x^2-8x) is 7x^2-2x

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simplify (3x^2+6x)+(4x^2-8x)

simplify

(3 x^{2} + 6 x) + (4 x^{2} - 8 x)

7 x^{2} - 2 x

Solution steps

(3 x^{2} + 6 x) + (4 x^{2} - 8 x)

Simplify

(3 x^{2} + 6 x) + (4 x^{2} - 8 x) : 3 x^{2} + 6 x + 4 x^{2} - 8 x

= 3 x^{2} + 6 x + 4 x^{2} - 8 x

Group like terms

= 3 x^{2} + 4 x^{2} + 6 x - 8 x

Add similar elements:

3 x^{2} + 4 x^{2} = 7 x^{2}

= 7 x^{2} + 6 x - 8 x

Add similar elements:

6 x - 8 x = - 2 x

= 7 x^{2} - 2 x

(x + 6)^{2} - 16

- 2 x^{3} + x

2 \frac{3}{8} + 1 \frac{1}{4}

49 x^{2} - 28 x y + 4 y^{2}

\frac{400}{50}