(а-4)^2+a(a+8) y-2-(y-5)^2 64m^2-(8m-n)^2 9x(x++1)^2 - вопрос №742720942825264282912 от Anastasyu120 25.12.2020 05:13

Question

Алгебра: (а-4)^2+a(a+8) y-2-(y-5)^2 64m^2-(8m-n)^2 9x(x++1)^2

Anastasyu120 · Answer

(а-4)²+а(а+8)=а²-8а+16+а²+8а=2а²+16=2(а²+8)

у-2-(у-5)²=у-2-(у²-10у+25)=у-2-у²+10у-25=-у²+11у-27=у²-11у+27

64m²-(8m-n)²=64m²-(64m²-16mn+n²=64m²-64m²-16mn+n²=n²-16mn

9x(x+6)-(3x+1)²=9x²+54x-(9x²+6x+1)=9x²+54x-9x²-6x-1=48x-1