Answered

algebraic 
5(-2)(3)-2(3)(5)(4)+7(-2)(5)(4)=
3(3+5- -2)+3(5)(4)-5(-2)(3)(5)(4)=
3{(-2+3)+(5-4)=
-81(-2+3)=(5-4)

Sagot :

Riza1viz
[tex]5(-2)(3)-2(3)(5)(4)+7(-2)(5)(4)= -30 -120- 280=-430\\\\3(3+5 -2)+3(5)(4)-5(-2)(3)(5)(4)=3\cdot 6 +60-600=18+60+600=678\\\\3 \left \{ (-2+3)+(5-4) \right \}=3(1+1)=3\cdot 2=6\\\\-81(-2+3)+(5-4)=-81 \cdot 1+1=80+1=81[/tex]