👤

Sagot :

Salut

A = 7x-21+4x-5

= 11x-26

B = 7x-12x+15

= -5x+15

C = 2x*3x+1*3x-2*2x-2*1

= 6x²+3x-4x-2

= 6x²-x-2

D = (4x-3)²

= (4x)²-2*4x*3+3²

= 16x² - 24x +9

E = (2x)²-7²

= 4x²-49

© 2024 IDNLearn. All rights reserved.