Question

y=-x² + 4x -4 função
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Answer 1

Resposta:

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

$a + b = 4\\ab = -(-4) = 4\\1,4\\2,2\\\\1+4 = 5\\2 + 2 = 4\\\\a = 2\\b = 2\\\\(-x^{2} +2x)+(2x-4)\\-x(x-2)+2(x-2)\\(x-2)(-x+2)\\- (x-2)^{2}$