11¹⁰(1+11)+ 4* (7⁴⁹-7⁴⁸)=11¹⁰(12)+ 4* (7⁴⁹-7⁴⁸)=12*11¹⁰+ 4* (7⁴⁹-7⁴⁸)
sin(sin(sin x)) ' = cos (sin(sin x))·cos (sin x)· cos x
1) 450:x=5
X=450:5
X=90
2)x-140=232
X=232+140
X=372
1. 9(x^2+10x+25)-(x^2-14x+49)=0
9x^2+90x+225-x^2+14x-49=0
8x^2+104x+176=0
x^2+13x+22=0
Д=b^2-4ac=169-4*1*22=169-88=81=9^2
x=-b+√Д÷2а=-13+9÷2*1=4÷2=2 x=-b-√Д÷2a=-13-9÷2=-22÷2=-11