1) (3a²b - 4ab³) : (5ab) =ab(3a - 4b²) : 5ab = (3a - 4b²) : 5; 2) (2c⁵b⁴ + 3c⁴b³) : ( -3c⁴b³) = c⁴b³( 2cb + 3) : ( -3c⁴b³) = - 1/3 (2bc + 3) = - 2/3bc - 1; 3) ( - 27(k⁴¹)⁵ + 21(k³¹)²) : ( -10(k³¹)² = ( - 27k²⁰⁵ + 21k⁶²) :- 10k⁶² = 2,7k¹⁴³ - 2,1; 4) ( - a⁵b³ + 3a⁶b²) : 4a⁴b² = - ( a⁵b²(b + 3a)) : 4a⁴b² = - 0,25a(b + 3a)
6^(1+log6 5) = 6*6^log6 5 = 6*5 =30
9^log3 √2 = 3^2log3 √2 = 3^log3 2 =2 (a^loga b =b)
log4 64 - log4 16 = log4 64/16 = log4 4 = 1
3log11 2 + log11 5 = log11 2^3 + log11 5 = log11 8*5 = log11 40
Например
у=2х-1
х -1 2
_____________
у -3 3
Через точки(-1;-3) и (2;3) проводишь прямую
(√87-7)²+14√ 87=87-14√87+49+14√87=136