👤

(5x – 3)2 – 2(6 – x)(6 + x) + 4( 6 – 3x)(5 + 7x)​

Răspuns :

Răspuns:

(5x – 3)2 – 2(6 – x)(6 + x)+4(6 – 3x)(5 + 7x)​ =

10x-6-2(6^2-x^2)+4(30+42x-15x-21x^2)=

10x-6-2(36-x^2)+4(30+27x-21x^2)=

10x-6-72+2x^2+120+108x-84x^2=

118x-82x^2+42=

2(59x-41x^2+21)=

Explicație pas cu pas: