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Tohaina

12x-15+\left(x+2\right)\left(x-7\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te 4x-5.
12x-15+x^{2}-7x+2x-14
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o x+2 ki ia tau o x-7.
12x-15+x^{2}-5x-14
Pahekotia te -7x me 2x, ka -5x.
7x-15+x^{2}-14
Pahekotia te 12x me -5x, ka 7x.
7x-29+x^{2}
Tangohia te 14 i te -15, ka -29.
12x-15+\left(x+2\right)\left(x-7\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te 4x-5.
12x-15+x^{2}-7x+2x-14
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o x+2 ki ia tau o x-7.
12x-15+x^{2}-5x-14
Pahekotia te -7x me 2x, ka -5x.
7x-15+x^{2}-14
Pahekotia te 12x me -5x, ka 7x.
7x-29+x^{2}
Tangohia te 14 i te -15, ka -29.