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45 Méli-mélo
Développe puis réduis ces expressions.
A = (9x – 7)

C = (2x - 3)(2x + 3)

B = (x + 9)(11 – 5x) D = (11 + 8x)2

E = (x + 1)2 + 7x(2 – x)

F = (x + 3)(2x – 1) - 3x(2x + 5)

G = (4t + 1)(4t – 1) – (3+ + 2)2

H = 2(s + 5)(s – 5) + (4s + 3)2

1 = (3x + 4)2 – (1 – 2x)(6 + x)

Pouvez vous m’aidez svp

Sagot :

Salut

[tex]C= (2x - 3)(2x + 3)[/tex]

[tex]C= 4x^{2} -9[/tex]

[tex]B = (x + 9) (11 - 5x)[/tex]

[tex]B=-34x-5x^{2} +99[/tex]

[tex]D = (11 + 8x)2[/tex]

[tex]D= 22+16x[/tex]

[tex]E = (x + 1)2 + 7x(2 - x)[/tex]

[tex]E=16x+2-7x^{2}[/tex]

[tex]F = (x + 3)(2x - 1) - 3x(2x + 5)[/tex]

[tex]F=-4x^{2} -10x-3[/tex]

[tex]G = (4t + 1)(4t - 1) - (3 + 2)2[/tex]

[tex]G=16t^{2} -11[/tex]

[tex]H = 2(s + 5)(s - 5) + (4s + 3)2[/tex]

[tex]H=2s^{2} -44+8s[/tex]

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