1) -(1/3 xy³)² * (-3x)³ = -<u>1 </u>* x² y⁶ * (-3³ x³) = 3x⁵y⁶
3²
2) (-2a³b)³ * (-2b) = -8a⁹b³ * (-2b) = 16a⁹ b⁴
3) (14/15)⁴ * (3/7)⁴ * (2.5)³ = <u>2⁴ * 7⁴</u> * <u>3⁴ </u>*<u> 5³ </u>= 2/5 =0.4
3⁴ * 5⁴ 7⁴ 2³
4) a³⁵ * a¹⁹ : (a⁵² * a²) = <u>a³⁵⁺¹⁹ </u>= <u>a⁵⁴</u> =1
a⁵²⁺² a⁵⁴
5) 0.2 * (-5)² - 3³ = 1/5 * 5² - 3³ = 5-27=-22
6) <u>(m³)⁵ (n⁴)³ </u>= <u>m³ * n¹² </u>= m³ n²
(m³)⁴ (n⁵)² n¹⁰
7) 3⁶ * 9⁻² * 5⁴ - 9*125*(1/5)⁻¹ =
=3⁶ * 3⁻⁴ * 5⁴ - 3² * 5³ * 5 =
=3² * 5⁴ - 3² * 5⁴ =0
Х2+8х+16 =0
Д= (8)^2 - 4×16=64-64=0
√(6 × 40) × √(60)<span> = </span><span>120</span>
X/x+5+5/x+5
1+5+5 дробь х 5/х+5
11+5/х (дробью 5/х)
11х+5
- --------
х
Получается 11х +5/х