Question

Me ajudem nessas questões pfvr​

Answer 1

Explicação passo-a-passo:

1)

$a)(a+5)^2=a^2+10a+25\\b)(x+3)^2=a^2+6x+9\\c)(Y+10)^2=Y^2+20Y+100\\d)(x+7).(x+7)=(x+7)^2=x^2+14x+49\\e)(5+3x)^2=25+30x+9x^2$

$2)\\a)(a-3)^2=a^2-6a+9\\b)(5-y)^2=25-10y+y^2$

$3)\\d)x^2-5x+6=0$