How do you simplify $(2 x^{2} - 8 x + 1) + (9 x^{2} + 4 x - 1)$ $(2x^2-8x+1)+(9x^2+4x-1)$ ?

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Answer 1 · 2015-07-04T15:47:44

$= 11 x^{2} - 4 x$ $=11x^2 - 4x$

$(2 x^{2} - 8 x + 1) + (9 x^{2} + 4 x - 1)$ $(2x^2-8x+1)+(9x^2+4x-1)$

Grouping like terms
$= (2 x^{2} + 9 x^{2}) + (- 8 x + 4 x) + (1 - 1)$ $=color(blue)((2x^2 + 9x^2) + color(green)((-8x + 4x)) + (1-1)$

$= 11 x^{2} - 4 x + 0$ $=color(blue)(11x^2color(green)(-4x) + 0$

How do you simplify (2x^2-8x+1)+(9x^2+4x-1) (2x2−8x+1)+(9x2+4x−1)(2x^2-8x+1)+(9x^2+4x-1) ?