Bonjour, pouvez vous m’aidez : on sais que f(x)= 4x² - 16x - 20 et g(x) = -8x+12

1) montrer que, pour tout réel x, f(x) - g(x) = 4(x-1)2-36

et

2) résoudre algébriquement, f(x) = g(x)

help me svp :/
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