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Tohaina

5x^{2}-15x-7x+21+75x\left(3x+8\right)
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 5x-7 ki ia tau o x-3.
5x^{2}-22x+21+75x\left(3x+8\right)
Pahekotia te -15x me -7x, ka -22x.
5x^{2}-22x+21+225x^{2}+600x
Whakamahia te āhuatanga tohatoha hei whakarea te 75x ki te 3x+8.
230x^{2}-22x+21+600x
Pahekotia te 5x^{2} me 225x^{2}, ka 230x^{2}.
230x^{2}+578x+21
Pahekotia te -22x me 600x, ka 578x.
5x^{2}-15x-7x+21+75x\left(3x+8\right)
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 5x-7 ki ia tau o x-3.
5x^{2}-22x+21+75x\left(3x+8\right)
Pahekotia te -15x me -7x, ka -22x.
5x^{2}-22x+21+225x^{2}+600x
Whakamahia te āhuatanga tohatoha hei whakarea te 75x ki te 3x+8.
230x^{2}-22x+21+600x
Pahekotia te 5x^{2} me 225x^{2}, ka 230x^{2}.
230x^{2}+578x+21
Pahekotia te -22x me 600x, ka 578x.