<span>(-3)^1 - 4 *1* (-5)=-3+20=-17</span>
(-2)^2-4*2*(-1)=2+8=10
2-4:6=2-2/3=1 1/3
1) 8; 16; 24; 32; 40.
2) 17; 34; 51; 68; 85.
3) 30; 60; 90; 120; 150.
4) 47; 94; 141; 188; 235.
S=а*а = 7*7=49 см²
Р=4*а = 4*7= 28 см
Вот!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!