Whakaoti i te (7x-5)(7x+3)-(7x-5)(8x+2)

$$(7x-5)(7x+3)-(7x-5)(8x+2)$$

Aromātai

$$\left(1-x\right)\left(7x-5\right)$$

Ngā Upane Otinga

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 7x-5 ki ia tau o 7x+3.

$$49x^{2}+21x-35x-15-\left(7x-5\right)\left(8x+2\right)$$

Pahekotia te 21x me -35x, ka -14x.

$$49x^{2}-14x-15-\left(7x-5\right)\left(8x+2\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 7x-5 ki ia tau o 8x+2.

$$49x^{2}-14x-15-\left(56x^{2}+14x-40x-10\right)$$

Pahekotia te 14x me -40x, ka -26x.

$$49x^{2}-14x-15-\left(56x^{2}-26x-10\right)$$

Hei kimi i te tauaro o 56x^{2}-26x-10, kimihia te tauaro o ia taurangi.

$$49x^{2}-14x-15-56x^{2}-\left(-26x\right)-\left(-10\right)$$

Ko te tauaro o -26x ko 26x.

$$49x^{2}-14x-15-56x^{2}+26x-\left(-10\right)$$

Ko te tauaro o -10 ko 10.

$$49x^{2}-14x-15-56x^{2}+26x+10$$

Pahekotia te 49x^{2} me -56x^{2}, ka -7x^{2}.

$$-7x^{2}-14x-15+26x+10$$

Pahekotia te -14x me 26x, ka 12x.

$$-7x^{2}+12x-15+10$$

Tāpirihia te -15 ki te 10, ka -5.

$$-7x^{2}+12x-5$$

Whakaroha

$$-7x^{2}+12x-5$$

Ngā Upane Otinga

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 7x-5 ki ia tau o 7x+3.

$$49x^{2}+21x-35x-15-\left(7x-5\right)\left(8x+2\right)$$

Pahekotia te 21x me -35x, ka -14x.

$$49x^{2}-14x-15-\left(7x-5\right)\left(8x+2\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 7x-5 ki ia tau o 8x+2.

$$49x^{2}-14x-15-\left(56x^{2}+14x-40x-10\right)$$

Pahekotia te 14x me -40x, ka -26x.

$$49x^{2}-14x-15-\left(56x^{2}-26x-10\right)$$

Hei kimi i te tauaro o 56x^{2}-26x-10, kimihia te tauaro o ia taurangi.

$$49x^{2}-14x-15-56x^{2}-\left(-26x\right)-\left(-10\right)$$

Ko te tauaro o -26x ko 26x.

$$49x^{2}-14x-15-56x^{2}+26x-\left(-10\right)$$

Ko te tauaro o -10 ko 10.

$$49x^{2}-14x-15-56x^{2}+26x+10$$

Pahekotia te 49x^{2} me -56x^{2}, ka -7x^{2}.

$$-7x^{2}-14x-15+26x+10$$

Pahekotia te -14x me 26x, ka 12x.

$$-7x^{2}+12x-15+10$$

Tāpirihia te -15 ki te 10, ka -5.

$$-7x^{2}+12x-5$$