Bonjoour,
Ex. 1 :
a) A = (-4)²+(-4)+5 = 19
b) B = (7+2(-1))(4-(-1)) = (7-2)(4+1) = (5)(5) = 25
Ex. 2 :
a) C=(5*x)*(x*(-6)) = (5x)(-6x) = -30x²
b) E = 2x(7-x)-(-3x+7) = 14x-2x²+3x-7 = -2x²+17x-7
c) 3+3y = 3(1+y)
5x²+10x = 5x(x+2)
-x-2 = -1(x+2)
36+54x = 18(2+3x)
Ex. 3 :
a) 30² = 900 cm²
b) (30-2x)²
c) entre 0 et 15
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Bonjoour,
Ex. 1 :
a) A = (-4)²+(-4)+5 = 19
b) B = (7+2(-1))(4-(-1)) = (7-2)(4+1) = (5)(5) = 25
Ex. 2 :
a) C=(5*x)*(x*(-6)) = (5x)(-6x) = -30x²
b) E = 2x(7-x)-(-3x+7) = 14x-2x²+3x-7 = -2x²+17x-7
c) 3+3y = 3(1+y)
5x²+10x = 5x(x+2)
-x-2 = -1(x+2)
36+54x = 18(2+3x)
Ex. 3 :
a) 30² = 900 cm²
b) (30-2x)²
c) entre 0 et 15