👤

Sagot :

VINS

Réponse :

bonsoir

A =  3 x 2 x 10 ² : 12 x 10 ⁻²

A = 6 x 10 ² : 12 x 10 ⁻²

A = 0.5 x 10 ⁴

A = 5 000

A = 5 x 10 ³

B = 35 x 3 x 10 ² : 21 x 10 ⁻¹

B = 105 x 10 ² : 21 x 10 ⁻¹

B = 5 x 10 ³

= 5 000

x² + 4 x + 4 = 0

( x + 2 )² = 0

x = - 2

49 x² - 28 x + 4 = 0

( 7 x - 2 )² = 0

x =  2/7

x² - 16 = 0

( x - 4 ) ( x + 4 ) = 0

x = 4 ou - 4

81 - 25 x² = 0

( 9 - 5 x ) ( 9  + 5 x ) = 0

x = 9/5 ou -  9/5

Explications étape par étape :

© 2024 IDNLearn. All rights reserved.