Bonjour,
A = 5x(x+3)+9x²(x+3) = (5x+9x²)(x+3) = x(5+9x)(x+3)
B = (2-x)4x-7(2-x) = (2-x)(4x-7)
C = 8(5-x)+5-x = 8(5-x)+1(5-x) = (8+1)(5-x) = 9(5-x)
D = 2x+3+x(2x+3) = 1(2x+3)+x(2x+3) = (1+x)(2x+3)
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Bonjour,
A = 5x(x+3)+9x²(x+3) = (5x+9x²)(x+3) = x(5+9x)(x+3)
B = (2-x)4x-7(2-x) = (2-x)(4x-7)
C = 8(5-x)+5-x = 8(5-x)+1(5-x) = (8+1)(5-x) = 9(5-x)
D = 2x+3+x(2x+3) = 1(2x+3)+x(2x+3) = (1+x)(2x+3)