Відповідь:
4. 3ab(2a²+3b²) - 4ab(b²-a²) = 6a³b + 9ab³ - 4ab³ + 4a³b = 10a³b + 5ab³
а = -2, в = 1.
10*(-2)³*1 + 5*(-2)*1³ = 10*(-2)³*1-5*2*1 = 10*(-2)³ - 10 = - 10*8 - 10 = - 80 - 10 = -90
5. (5a² - 16a + 2) + (-a² + 6a - 2) = 5a² - 16a + 2 - a² + 6a - 2 = 4a² - 10a
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Відповідь:
4. 3ab(2a²+3b²) - 4ab(b²-a²) = 6a³b + 9ab³ - 4ab³ + 4a³b = 10a³b + 5ab³
а = -2, в = 1.
10*(-2)³*1 + 5*(-2)*1³ = 10*(-2)³*1-5*2*1 = 10*(-2)³ - 10 = - 10*8 - 10 = - 80 - 10 = -90
5. (5a² - 16a + 2) + (-a² + 6a - 2) = 5a² - 16a + 2 - a² + 6a - 2 = 4a² - 10a