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Tohaina

15x^{2}-25x-15x+25+\left(-5x+5\right)\left(x-2\right)
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o -5x+5 ki ia tau o -3x+5.
15x^{2}-40x+25+\left(-5x+5\right)\left(x-2\right)
Pahekotia te -25x me -15x, ka -40x.
15x^{2}-40x+25-5x^{2}+10x+5x-10
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o -5x+5 ki ia tau o x-2.
15x^{2}-40x+25-5x^{2}+15x-10
Pahekotia te 10x me 5x, ka 15x.
10x^{2}-40x+25+15x-10
Pahekotia te 15x^{2} me -5x^{2}, ka 10x^{2}.
10x^{2}-25x+25-10
Pahekotia te -40x me 15x, ka -25x.
10x^{2}-25x+15
Tangohia te 10 i te 25, ka 15.
15x^{2}-25x-15x+25+\left(-5x+5\right)\left(x-2\right)
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o -5x+5 ki ia tau o -3x+5.
15x^{2}-40x+25+\left(-5x+5\right)\left(x-2\right)
Pahekotia te -25x me -15x, ka -40x.
15x^{2}-40x+25-5x^{2}+10x+5x-10
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o -5x+5 ki ia tau o x-2.
15x^{2}-40x+25-5x^{2}+15x-10
Pahekotia te 10x me 5x, ka 15x.
10x^{2}-40x+25+15x-10
Pahekotia te 15x^{2} me -5x^{2}, ka 10x^{2}.
10x^{2}-25x+25-10
Pahekotia te -40x me 15x, ka -25x.
10x^{2}-25x+15
Tangohia te 10 i te 25, ka 15.