Question

factorise
x² - 2x + 4​

Answer 1

Answer:

$x {}^{2} - 2x + 4$

$x {}^{2} - (2 + 2)x + 4$

$x {}^{2} - 2x - 2x + 4$

$x(x - 2) -2(x - 2)$

$(x - 2)(x - 2)$

Answer 2

Answer:

x^2-2x+4

D=(2)^2-4*4*1

D=4-16

D=-12

As D<0

No roots exist