Question

Please please help me with this question please now and show your steps

Answer 1

`y = {x}^(2) - 8x + 7 \\ a = 1 \: and \: b = - 8 \\ the \: line \: of \: symmetry \: \\ x = ( - b)/(2a) = (8)/(2) \\ x = 4(line \: of \: symmetry) \\ y = {4}^(2) - 8(4) + 7 \\ = 16 + 32 + 7 = y = 55 \\ vertix \: is \: (4 ,55) \\ y = {0}^(2) - 8(0) + 7 \\ y = 7 \\ 0 = {x}^(2) - 8x + 7 \\ (x - 7)(x - 1) = 0`