Question

Escreva a equações na forma reduzida
a) 2x(4x-2)-4=0
b) (6x+2)²-16=0
c) (x+1)²=x+7

Answer 1

$a) 2x(4x-2)-4=0 \to\\\\ 8 x^{2} -4x-4=0\\ \\\\\\\\b) (6x+2)^2-16=0\to\\\\ (6x+2)* (6x+2)-16=0\to \\\\ 36 x^{2} +6x+6x+4-16=0\to\\\\ 36 x^{2} +12x-12=0\\\\\\\\\\c) (x+1)^2=x+7\to\\\\\\ (x+1)*(x+1)=x+7\to \\\\ x^{2} +x+x+1=x+7\to \\\\ x^{2} +2x+1-x-7=0\to\\\\ x^{2} +x-6=0$