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ESTUROVA

Bonjour !

A = (2t -5)(3t + 2) - (t² + 6)

A = 6t² - 15t + 4t - 10 - t² - 6

A = 5t² - 11t - 16

B = (2a -5)(3 -4a) - 2(5 -a)

B = 6a - 15 - 8a² + 20a - 10 + 2a

B = 28a - 25 - 8a²

J'espère t'avoir aidé. Bon courage !

JYO

[tex]A=(2t-5)(3t+2)-( {t}^{2} + 6) \\ a = 6 {t}^{2} + 4t - 15t - 10 - {t}^{2} - 6 \\ a = 5 {t}^{2} - 11t - 16[/tex]

[tex]b = (2a - 5)(3 - 4a) - 2(5 - a) \\ b = 6a - 8 {a}^{2} - 1 + 20a - 10 + 2a \\ b = - 8 {a}^{2} + 28a - 11[/tex]

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