Question

Por favor me ajude a responder

Answer 1

Resposta:

Explicação passo a passo:

$a)$

$-x^{2} +3x^{2} -10x^{2} =(-1+3-10)x^{2} =-8x^{2}$

$b)$

$y^{3} -y^{3} -y^{3} +y^{3} =0$

$c)$

$2ab-4ab+2ab=(2-4+2)ab=0ab=0$

$d)$

$2xy+xy+10x=3xy+10x$

$e)$

$4a^{3} -a^{3} +2a^{3} =(4-1+2)a^{3} =5a^{3}$

$f)$

$2.(x+2x)+7x-5x=2x+4x+7x-5x=(2+4+7-5)x=8x$