1.
= 7²a⁸b¹⁰ = 49a⁸b¹⁰
2.
= (n³⁻⁽⁻³⁾)⁻⁴ = (n⁶)⁻⁴ = n⁻²⁴
3.
= 0,6⁻⁴a²⁴b¹²*8a⁻²b⁻¹ = (10/6)⁻⁴*8a²²b¹¹ = (6/10)⁴*8a²²b¹¹ = (3/5)⁴*8a²²b¹¹ = 3⁴/5⁴*8a²²b¹¹ = 728/625a²²b¹¹
4.
D = 36-4*3*(-7) = 36+84 = 120
5.
x(x+11) = 0
x = 0 x+11=0
x= -11
Ответ: 0 и -11
4.
4х>14 x>3,5
3x> -3 x> -3
Ответ: х∈(3,5; +∞)
5.
= (7√3)² - (√11)² = 49*3 - 11 = 147 - 11 = 136
6.
S = √p(p-a)(p-b)(p-c), где a,b,c - стороны Δ, р - полупериметр (a+b+c)/2
p = (10+9+7)/2 = 13(см)
S = √13*3*4*6 = 6√26 (см²)