Réponse :
A = (x + 5)²
(x+5)(x+5)
x^2+5x+5x+25
x^2+10x+25
B = (4 + 7x)²
(4 + 7x)(4 + 7x)
16+28x+28x+49x^2
16+56x+49x^2
C = (y + 3)(y - 3)
y^2-3y+3y-9
y^2-9
D = (2x + 5)(2x - 5)
4x^2-10x+10x-25
4x^2-25
E = (x - 5)²
(x - 5)(x - 5)
x^2-5x-5x+25
x^2-10x+25
F = (3x - 7)²
(3x - 7)(3x - 7)
9x^2-21x-21x+49
9x^2-42x+49
Explications étape par étape
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Réponse :
A = (x + 5)²
(x+5)(x+5)
x^2+5x+5x+25
x^2+10x+25
B = (4 + 7x)²
(4 + 7x)(4 + 7x)
16+28x+28x+49x^2
16+56x+49x^2
C = (y + 3)(y - 3)
y^2-3y+3y-9
y^2-9
D = (2x + 5)(2x - 5)
4x^2-10x+10x-25
4x^2-25
E = (x - 5)²
(x - 5)(x - 5)
x^2-5x-5x+25
x^2-10x+25
F = (3x - 7)²
(3x - 7)(3x - 7)
9x^2-21x-21x+49
9x^2-42x+49
Explications étape par étape