Question

разложите на множители выражение 4(5-x)²-3(x-5)

Answer 1

$4(5 - x)^2 - 3(x - 5) = 4(5-x)(5-x) - 3(x - 5) =\\ 4(5-x)(5-x) + 3(5 - x) = (5 -x)(4(5 - x) + 3) =\\(5 - x)(20 - 4x + 3) = (5 - x)(23 - 4x)$