Question

Answer 1

\(d,x^2+2x+1-5-4+4x-x^2=0\\ 6x-8=0\\ 6x=8\\ x=\dfrac{4}{3}\\ e,x^2-25-x^2-6x=0\\ -6x-25=0\\ -6x=25\\ x=-\dfrac{25}{6}\\ f,\left(x+3\right)^3=2^3\\ \left(x+3\right)=2\\ x+3=2\\ x=-1\)

Answer 2

`a, x^2 + 2x + 1 -5 = x^2 - 4x + 4`

`= x^2 + 2x - 4 = x^2 - 4x + 4`

`-> 6x = 8`

`-> x = 4/3`

`b, x^2 - 25= x^2 + 6x`

`-25 = 6x`

`x = -25/6`