Exercice de maths sur la factorisation (suite) besoin d'aide

d) (3x+....)² = ....+.....+4

e) (1-....)(.......+........) = .......-49x²

f) (.........-8)² = .........-48x+.....

g) (.....+........)(.......-3) = 100y²

Merci a ceux qui répondront ! :)
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