Question

ayudaaaa plis y doy coronita​

Answer 1

Respuesta:

13. $\left(a+b+1\right)^2-\left(a+b+1\right)\left(x-2\right)+\left(a+b+1\right)$$=\left(a+b+1\right)^2-\left(a+b+1\right)\left(x-2\right)+a+b+1$

$=\left(a+b+1\right)\left(a+b+1\right)-\left(a+b+1\right)\left(x-2\right)+a+b+1$

$=2ab+a^2+2a+b^2+2b+1-\left(a+b+1\right)\left(x-2\right)+a+b+1$

$=2ab+a^2+2a+b^2+2b+1-ax+2a-bx+2b-x+2+a+b+1$

$=-ax-bx-x+a^2+5a+2ab+b^2+5b+4$

14.$\left(x^4-t\right)^3y^2-\left(x^4-t\right)\left(y-1\right)+\left(x^4-t\right)\left(y-2\right)$

$=y^2\left(x^4-t\right)^3-\left(x^4-t\right)\left(y-1\right)+\left(x^4-t\right)\left(y-2\right)$$=\left(x^{12}-3x^8t+3x^4t^2-t^3\right)y^2-\left(x^4-t\right)\left(y-1\right)+\left(x^4-t\right)\left(y-2\right)$

$=x^{12}y^2-3x^8ty^2+3x^4t^2y^2-t^3y^2-\left(x^4-t\right)\left(y-1\right)+\left(x^4-t\right)\left(y-2\right)$

$=x^{12}y^2-3x^8ty^2+3x^4t^2y^2-t^3y^2-x^4y+x^4+ty-t+\left(x^4-t\right)\left(y-2\right)$

$=x^{12}y^2-3x^8ty^2+3x^4t^2y^2-t^3y^2-x^4y+x^4+ty-t+x^4y-2x^4-ty+2t$$=x^{12}y^2-t^3y^2+3x^4t^2y^2-3x^8ty^2-x^4+t$

15. $\left(y^2+y+7\right)^2c^2-\left(y^2+y+7\right)\left(c-3\right)+y^2+y+7$

$=c^2\left(y^2+y+7\right)^2-\left(y^2+y+7\right)\left(c-3\right)+y^2+y+7$

$=c^2\left(y^2+y+7\right)\left(y^2+y+7\right)-\left(y^2+y+7\right)\left(c-3\right)+y^2+y+7$

$=c^2y^4+2c^2y^3+15c^2y^2+14c^2y+49c^2-\left(y^2+y+7\right)\left(c-3\right)+y^2+y+7$

$=c^2y^4+2c^2y^3+15c^2y^2+14c^2y+49c^2-cy^2+3y^2-cy+3y-7c+21+y^2+y+7$

$=c^2y^4+2c^2y^3+15c^2y^2+4y^2-cy^2+14c^2y+4y-cy+49c^2+28-7c$

Explicación paso a paso:

Espero haber ayudado

Excelente día