👤

Sagot :

Bonsoir,

4) (2x-5)²+(5-3x)(2x-5)

= 4x²-20x+25+10x-25-6x²+15x

= -2x²+5x

5) (2x-5)²+(5-3x)(2x-5)

= (2x-5)(2x-5)+(5-3x)(2x-5)

= (2x-5)(2x-5+5-3x)

= (2x-5)(-x)

=-(2x-5)x

6) x=2,5 ⇒ -(2x-5)x = -(2(2.5)-5)(2,5)

                                = -(5-5)(2,5)

                                = -(0)(2,5)

                                = 0

Other Questions

© 2024 IDNLearn. All rights reserved.