Question

EXERCISE 6.2
Factorise the following expressions
$4 x {}^{2} \: - 8x + 4$
please explain this
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Answer 1

${4x}^{2} - 8x + 4 = 0\\ {4x}^{2} - 4x - 4x + 4 = 0\\ 4x(x - 1) - 4(x - 1) = 0\\ (x - 1)(4x - 4) = 0\\ \sf \therefore \: \: x = \green1 \: \: \: { \rm{or}} \: \: \: \green1$