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August 2022 2 4 Report

Помогите пожалуйста!!!
буду очень благодарна.
1. Выполни умножение:
3x^2*(5x^3-2x^2+1)

2. Найдите значение многочлена:
8-45a^2b при a=-1/3; y=1/5

neodim

1. 3x²*(5x³-2x²+1)=15x⁵-6x⁴-3x².

2, 8-45a²b=8-45*(-1/3)²*(1/5)=8-(1/9)*(1*5)=8-45*(1/45)=8-1=7.

0 votes Thanks 1

sangers1959

Verified answer

1.
$3 {x}^{2} \times 5 {x}^{3} - 3 {x}^{2} \times 2 {x}^{2} + 3{x}^{2} \\ 15 {x}^{5} - 6 {x}^{4} + 3{x}^{2}$
2.
$8 - 45 \times ( - \frac{1}{3} )^{2} \times \frac{1}{5} \\ 8 - 45 \times \frac{1}{9} \times \frac{1}{5} \\ 8 - 5 \times \frac{1}{5} \\ 8 - 1 = 7$

1 votes Thanks 1

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