Question

Answer 1

\(a.4-8x^2=4\left(1-2x\right)\) 

\(b.x^2-6x+9=\left(x-3\right)^2\) 

\(c.5x^2+10+5=5\left(x^2+2+1\right)=5\left(x+1\right)^2\)

Answer 2

\(1,=4\left(1-2x\right)\\ 2,=\left(x-3\right)^2\\ 3,Sửa:5x^2+10x+5=5x^2+5x+5x+5=5x\left(x+1\right)+5\left(x+1\right)=\left(5x+5\right)\left(x+1\right)\)